6gt

[Overwatch260]

I tried AR Comp, 8208 XBR & a few with Varget... AR Comp was one of the few I had on hand that showed 100% burn in an 18" barrel and it definitely was the most accurate of the 3. Gonna save the Varget & H4350 for the heavier stuff

 

[Malum Prohibitum]

He posted it - AR-Comp

Thanks - I never heard of it, so I did not realize it was powder. Learned something new.

 

[Overwatch260]

Thanks - I never heard of it, so I did not realize it was powder. Learned something new.

Yessir, I still had 8 lbs of it sitting on the shelf from when I was trying some .223 bolt gun & AR-15 loads... Most folks use it for .223 stuff. It's supposedly very temperature stable powder and at one time was a lot easier to find than Hodgdon powders in similar burn rates. Glad I kept it around now!

 

[DeathBeforeDismount]

Starting to see a new issue. I haven't adjusted my sizing dies in the last 2 runs. I am getting almost exactly 1.5-2 thousand shoulder bump.

After running through the Sizing die and mandrel, the cases will not drop into a case gauge. Its almost like the base of the case is expanding out. Has anyone else seen these issues? Probably have 10 firings on this brass , on the 5th barrel.

 

[davere]

After running through the Sizing die and mandrel, the cases will not drop into a case gauge. Its almost like the base of the case is expanding out. Has anyone else seen these issues? Probably have 10 firings on this brass , on the 5th barrel.

Haven't gotten into my 2nd GT barrel, yet, so I haven't seen it there, but definitely seen it with other cartridges - especially when swapping barrels. Basically, the very bottom of the case isn't getting sized down and eventually expands just a bit.

The fix for .308 case head size cases is actually surprisingly easy (at least, it has been for me, in the past). Get a Lee .45 ACP U-die (undersize sizing die), take the decapping stem out of it, and run your cases through it. It's a carbide die for a straight wall pistol case, so it's just a sizing ring - won't bump your shoulders or anything like that (which is something that *will* happen with cartridges that have a small base die - to full size the base, you end up squishing your shoulders back a lot, too). Then do a normal sizing die pass.

 

[Malum Prohibitum]

Are some full length sizing dies fuller length than others?

 

[davere]

Are some full length sizing dies fuller length than others?

Yeah, they are... And it depends on how the die works, vs your shoulder bump, too. If you've got a die that uses a neck bushing (or no bushing), and you set the die to only bump .001-.002, you might not be sizing the lower most part of the case... And I've even had this issue w/ SAC neck/shoulder bushing die sizing .25 Creed, so...

Also.... I can't find any data for this, and I don't have the tooling to measure it myself at the moment... but I suspect it's also possible that your chamber might expand ever so slightly through its lifetime (like, .001-.0015"-ish?)... and that's potentially enough to cause brass to no longer fit in a new chamber, even when cut by the same reamer (when we're talking tight match chambers, etc). I have absolutely no idea if that's a horseshit thought at all, just me conjecturing, so probably ignore it, but... <shrug>

 

[Andrew863]

I just picked up a 6gt proof prefit, is there any recommendations on a FL sizing die? I'm leaning towards redding type s dies, but if there is something better or as good for less coin I'm in. I'm probably going to get alpha brass since Lapua isn't out yet and I don't want to toss it after 4 firings with hornady.

 

[Malum Prohibitum]

This is what I bought.

Hornady 6mm GT die set w/ Microjust Seater

Hornady 6mm GT die set w/ Microjust Seater Hornady Custom Grade 6mm GT die set, with Microjust Seating Stem. (non bushing style) Hornady Item numbers: Custom Grade Die set # 041624C Microjust Seating Micrometer #044090 The full length si

www.gaprecision.net

Hornady Custom Grade 6mm GT die set, with Microjust Seating Stem. (non bushing style)

Hornady Item numbers:

• Custom Grade Die set # 041624C
• Microjust Seating Micrometer #044090
• The full length sizer die is cut with a .266" neck diameter - Perfect for about .002" neck tension with the Alpha Munitions or Hornady 6mm GT brass.

 

[Gogga]

I just picked up a 6gt proof prefit, is there any recommendations on a FL sizing die? I'm leaning towards redding type s dies, but if there is something better or as good for less coin I'm in. I'm probably going to get alpha brass since Lapua isn't out yet and I don't want to toss it after 4 firings with hornady.

I've used Type S dies but read people were pleased with the RCBS Matchmaster 6GT dies so I've got a set coming.

 

[Andrew863]

I've used Type S dies but read people were pleased with the RCBS Matchmaster 6GT dies so I've got a set coming.

I'm in the same boat, I have type s dies for my 6cm and 338LM but I don't remember the sizing die being 260 lol. Maybe I'm being a cheap ass but I am considering the Hornady and the RCBS.

 

[wildturkey2]

Only with gen 1 alpha brass.

So second Generation alpha is good to go .

 

[Overwatch260]

So second Generation alpha is good to go .

IIRC the issues were with the first run or 2 of brass, no problems with the newer OCD cases

 

[Gogga]

I'm in the same boat, I have type s dies for my 6cm and 338LM but I don't remember the sizing die being 260 lol. Maybe I'm being a cheap ass but I am considering the Hornady and the RCBS.

I like to save money but I'm waiting on a backorder for Lapua brass so I'm obviously not too tight!

 

[wildturkey2]

IIRC the issues were with the first run or 2 of brass, no problems with the newer OCD cases

ok thanks and how is the 6 GT competing against the 6 Dasher.

 

[Kadams1563]

Starting to see a new issue. I haven't adjusted my sizing dies in the last 2 runs. I am getting almost exactly 1.5-2 thousand shoulder bump.

After running through the Sizing die and mandrel, the cases will not drop into a case gauge. Its almost like the base of the case is expanding out. Has anyone else seen these issues? Probably have 10 firings on this brass , on the 5th barrel.

Try the cortina mandrel. It has a base that squeezes down the brass near the case head to prevent it from swelling.

It’s an expensive mandrel for but it’s coated and very slick.

 

[LR1845]

This is what I bought.

Hornady 6mm GT die set w/ Microjust Seater

Hornady 6mm GT die set w/ Microjust Seater Hornady Custom Grade 6mm GT die set, with Microjust Seating Stem. (non bushing style) Hornady Item numbers: Custom Grade Die set # 041624C Microjust Seating Micrometer #044090 The full length si

www.gaprecision.net

I have these and the are a little rough...they don't scratch or anything like that just not smooth...I prefer the forster size with honed neck super smooth and they size the base a bit more than the other dies I have.

 

[Overwatch260]

ok thanks and how is the 6 GT competing against the 6 Dasher.

Haven't ran a Dasher personally so I'll have to let someone that has run both comment on direct comparison... IMHO you can't go wrong with either, they're both extremely capable in the accuracy department and have great quality components available. The thing that appealed to me was that the GT was designed for .308 family AICS/AW mags and I already had AW mags on hand. Just didn't want to buy another batch of mags that were BR/BRA/Dasher specific or try to find spacer kits. IMO it kinda boils down to whether you're starting from scratch and buying all new parts or if you already have AICS or AW mags you can use.

 

[Andrew863]

What about the L.E Wilson sizing die? Anyone using one. I know there seating dies are good and I use there mandrel die and it has been great but I haven't heard much about the bushing sizer.

 

[LR1845]

What about the L.E Wilson sizing die? Anyone using one. I know there seating dies are good and I use there mandrel die and it has been great but I haven't heard much about the bushing sizer.

They are very nice dies I have own a couple of them in the past.

 

[farrar86]

I'm running LE Wilson fl sizing die. Build quality is really nice.

 

[DubfromGA]

Cool seeing this ad in a magazine I just pulled out of my mailbox.

 

[DubfromGA]

No loading today.....but I did knock out some brass prep.

This 100rd batch is now ready to prime, charge and seat.

Gonna sleep on it tonight and load 'em in the morning.

Good coffee will be waiting.

 

[wildturkey2]

No loading today.....but I did knock out some brass prep.

This 100rd batch is now ready to prime, charge and seat.

Gonna sleep on it tonight and load 'em in the morning.

Good coffee will be waiting.


View attachment 8451265View attachment 8451266View attachment 8451267

 

[wildturkey2]

looks good buddy

 

[DubfromGA]

Anyone running the 105grn Barnes Match Burners I see and yes I looked people have used the 112grns didn't see anything on 105's? Ordered and MPA 6GT for Production Division want to start getting supplies now.

Great sales prices on the 6mm Match Burners this week at MidwayUSA.

Picked up 1,000.

 

[DubfromGA]

looks good buddy

Thanks.


Going to get busy on the loading as soon as finish up on the rifle assembly.

This afternoon, hopefully.

 

[Malum Prohibitum]

No loading today.....but I did knock out some brass prep.

This 100rd batch is now ready to prime, charge and seat.

Gonna sleep on it tonight and load 'em in the morning.

Good coffee will be waiting.


View attachment 8451265View attachment 8451266View attachment 8451267

I guess I am the only ignorant one here - what am I looking at in the primer area in the first picture? Sorry, but I cannot figure it out. They are not loaded primers, but do not appear to be shot primers with a dent. What is that?

 

[Overwatch260]

I guess I am the only ignorant one here - what am I looking at in the primer area in the first picture? Sorry, but I cannot figure it out. They are not loaded primers, but do not appear to be shot primers with a dent. What is that?

Shiny clean or new primer pockets... Reflections of the flash holes in the sides of the pockets?

 

[TheOE800]

Shiny clean or new primer pockets... Reflections of the flash holes in the sides of the pockets?

Yep.

 

[DubfromGA]

I guess I am the only ignorant one here - what am I looking at in the primer area in the first picture? Sorry, but I cannot figure it out. They are not loaded primers, but do not appear to be shot primers with a dent. What is that?

 

[Malum Prohibitum]

LOL, Thanks, I guess it was an optical illusion for me on the first picture. I feel a little silly now.

 

[Andrew863]

Great sales prices on the 6mm Match Burners this week at MidwayUSA.

Picked up 1,000.

Man I wish I had tried those. I really want to get away from the 109 hybrid bc I can't always find them and 2 for the price. I have read so much about the MB being inconsistent. I have to get some to give a try. If I knew my barrel would like them I would get 3k for the season.

 

[Kadams1563]

Man I wish I had tried those. I really want to get away from the 109 hybrid bc I can't always find them and 2 for the price. I have read so much about the MB being inconsistent. I have to get some to give a try. If I knew my barrel would like them I would get 3k for the season.

Just get the 108 or 109 eldm. They run great for any match related shoots.

 

[Andrew863]

Just get the 108 or 109 eldm. They run great for any match related shoots.

I know some people like them, but in the 3 6mm barrels I have had, I have never had one shoot the eldm. I have had them like a tips. But nothing a consistent as the 109 from group to group and day to day. They just seem to have such a large tuning window.

 

[John Glidewell]

Man I wish I had tried those. I really want to get away from the 109 hybrid bc I can't always find them and 2 for the price. I have read so much about the MB being inconsistent. I have to get some to give a try. If I knew my barrel would like them I would get 3k for the season.

108 elite hunter is a hybrid ogive. I also ran 108 BT and 107 SMK with good success. 107s can be had for less $$.

 

[wildturkey2]

108 elite hunter is a hybrid ogive. I also ran 108 BT and 107 SMK with good success. 107s can be had for less $$.

ok thanks i have some 107s

 

[Andrew863]

108 elite hunter is a hybrid ogive. I also ran 108 BT and 107 SMK with good success. 107s can be had for less $$.

Yea I talk to Berger about that also but never tested them, but they did confirm its a hybrid with a thinner jacket. The 107 and 110smk are on the list to test with the new barrel. I have 2 more comps to finish the season with my 6cm then I'll be making the swap. I really want to find a cheaper bullet for practice and then use the 109 for comps. Maybe I will get lucky and find a cheaper bullet I like.

 

[John Glidewell]

Yea I talk to Berger about that also but never tested them, but they did confirm its a hybrid with a thinner jacket. The 107 and 110smk are on the list to test with the new barrel. I have 2 more comps to finish the season with my 6cm then I'll be making the swap. I really want to find a cheaper bullet for practice and then use the 109 for comps. Maybe I will get lucky and find a cheaper bullet I like.

I am running 115 DTACs in mine now. I was in same boat trying to find a good replacement. DTACs are doing very well.

 

[wildturkey2]

I am running 115 DTACs in mine now. I was in same boat trying to find a good replacement. DTACs are doing very well.

ok thanks the GT must have enough HP than ? what’s your FPS ?

 

[John Glidewell]

ok thanks the GT must have enough HP than ? what’s your FPS ?

33.2 of RL 15.5 @ 2830. I can run them faster, but they like low 2800s more.

 

[CK1.0]

Man I wish I had tried those. I really want to get away from the 109 hybrid bc I can't always find them and 2 for the price. I have read so much about the MB being inconsistent. I have to get some to give a try. If I knew my barrel would like them I would get 3k for the season.

The MBs are way more consistent than their price suggests.

The average reloader? Not so much lol

I’ve been going back and forth between MBs and A-Tips and if I miss, it’s me, not the bullet’s fault.

 

[DubfromGA]

Man I wish I had tried those. I really want to get away from the 109 hybrid bc I can't always find them and 2 for the price. I have read so much about the MB being inconsistent. I have to get some to give a try. If I knew my barrel would like them I would get 3k for the season.

I am just now getting my sea legs back underneath me after a 20 absence from reloading.
Now I have the time and space to set things up.

Mighty enjoyable.

I have no plans for any competitive stuff.....just a mid-50's guy who is enjoying getting into longer range shooting.
4 more years until retirement.....hopefully get knee replacements done prior to that.....then perhaps the circumstances will line up for me to trying my hand at some formal shooting beyond just plinking with buddies and trash talking.


My first attempts at putting together a target gun have gone fairly smoothly.
Spun on the action and completed the assembly yesterday.

Hopefully time will permit for getting some rounds loaded later this afternoon.

This is the 105gr MB.....representative of what it measures at jam in my barrel.
Gonna back it up and load 5-10 rounds at incremental charge weights and see how she does.

The fire is stoked.

The MBs are way more consistent than their price suggests.

The average reloader? Not so much lol

I’ve been going back and forth between MBs and A-Tips and if I miss, it’s me, not the bullet’s fault.

Your posts on the MB gave me the confidence to try them.


I have some ELDM's & Varget set aside for this gun.......but I wanted to first get started with a more affordable combination. My local range sells SW Precision for $35-$40 / lb to range members. I've asked him to check on 8lb jug pricing. Until then I am trying to buy 1lb from same lot #'s.

105gr MB over SW Precision this evening or early tomorrow morning

Hoping to find an accurate load in the medium-->3/4-ish charge range.

Thank you for helping get this plan going through your comments.
I'd have never tried them....and been unaware. Barnes, in my mind, was strictly all-copper hunting stuff.

Mighty glad to learn other wise.

 

[CK1.0]

If there's anything I've learned about components, it's that to truly know you've got to try it yourself...usually, in bulk.

Because we cannot find out if the shit part is the new component, or us, over 100rds. Having some skin in the game makes it so giving up or quitting isn't too easy...

Some components are better than others for sure, but if one thinks a $0.60 projectile is twice as good as a $0.30 projectile every time, they're kidding themselves. Buy some, throw some on a fancy scale, measure some with some fancy calipers, and most of all, shoot them and see. They might be 1% better, maybe 5% better depending on what facet you're scrutinizing, but the difference isn't as vast as some guys think it is.

The longer I do this shit the more I feel like the main limiting factor is really the monkey pulling the handle/trigger. lol

 

[DubfromGA]

The longer I do this shit the more I feel like the main limiting factor is really the monkey pulling the handle/trigger. lol

In my case there is no doubt about it....the monkey pulling the trigger is most assuredly the choke point to greatness.

I have nowhere to go but up......(or broke).

 

[wildturkey2]

In my case there is no doubt about it....the monkey pulling the trigger is most assuredly the choke point to greatness.

I have nowhere to go but up......(or broke).

yes sir !!!!!

 

[Gogga]

Can you get sufficient velocity out of the DTAC'S with the GT to get the most out of the BC?

 

[4O6shootist]

Can you get sufficient velocity out of the DTAC'S with the GT to get the most out of the BC?

I have ran em 2830-2880 depending on barrel length, all 7.5tw, DA between 3000-7000, my g7 of 314 has been money inside 1000y, to 1400 it needed 312g7 for waterline. I run 313avg, been solid! This is a low psi load of 35.6gr of H4350, I can take the Same load and run it in 26 28 and 30" barrels and it's sub half minute. Seated 20k jump in a 0.170fb chamber.

 

[Gogga]

I have ran em 2830-2880 depending on barrel length, all 7.5tw, DA between 3000-7000, my g7 of 314 has been money inside 1000y, to 1400 it needed 312g7 for waterline. I run 313avg, been solid! This is a low psi load of 35.6gr of H4350, I can take the Same load and run it in 26 28 and 30" barrels and it's sub half minute. Seated 20k jump in a 0.170fb chamber.

That's very promising. I shoot on a range with very unpredictable, switching winds so any advantage helps. My .308 (155gr @2650, 20")load is very accurate but gets blown around easily. I think the GT with a 115gr could be a nice upgrade.

 

[Malum Prohibitum]

My barrel was cut with an Alpha Munitions Legacy Reamer with a .120” freebore.

Anybody have any advice or suggestions applicable to me and my chamber? I do not know anything about it other than what I wrote in the line above this one, well, other than the rather obvious math of .170-.120 = .050"