How did they group up?37.5gr H4350, 110 SMKs .120" jump, virgin Hornady brass, 3000fps
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How did they group up?37.5gr H4350, 110 SMKs .120" jump, virgin Hornady brass, 3000fps
Awesome, thanks for the info. Should be getting my barrel anytime now.First time out I tested 60, 90, and 120 thou jump at 300yds. 60 was about moa, 90 was a little over 1/2 minute, 120 was an inch so a 1/3moa. The second time I tested 120 jump and 15 thou on either side to see how tolerant of throat erosion it was. .105 wasn't great. About 2/3 moa, 120 looked good again at about 1.2" at 300(due to one Rd dropping low), and .135 jump looked decent. Single digit SDs.
I mentioned that load at .120" jump bc it was a viable and good load.
what step and equipment did you take to form the lapua case?
what step and equipment did you take to form the lapua case?
I have a Henderson trimmer and an IDOD neck turning on order. Those combined should speed things up even more.
I might offer 6gt lapua brass in the future to anyone interested. Just need to test it out a bit. As it stands, 6% less case capacity than hornady.
Seems like a lot of work.5 sacrificial/test lapua 6gt
Hornady on left for comparison. I’m not looking to go above 2950. So, *hopefully* it works fine.
Going to just load 31gr varget. Debating if I should barely jam lands or just jump .020. Just to get an initial fireform.
View attachment 7294031
I'm sure the optimized process and equipment will help get the time down if you keep doing it from Lapua brass. With anything like that though, you gotta ask "what's my time worth?" Even if you could get that down to 2min per case (doubtful with all the touch time listed), that's only 30 pcs/hr. So if your free time is only worth $15/hr then you could charge $0.50/pc for the conversion. If it was me, I'd be charging $3/pc minimum, which no one would pay. And the thought of someone ordering 1000 cases to be converted would be enough for me to want to jump out a window lolI have a Henderson trimmer and an IDOD neck turning on order. Those combined should speed things up even more.
I might offer 6gt lapua brass in the future to anyone interested. Just need to test it out a bit. As it stands, 6% less case capacity than hornady.
I'm sure the optimized process and equipment will help get the time down if you keep doing it from Lapua brass. With anything like that though, you gotta ask "what's my time worth?" Even if you could get that down to 2min per case (doubtful with all the touch time listed), that's only 30 pcs/hr. So if your free time is only worth $15/hr then you could charge $0.50/pc for the conversion. If it was me, I'd be charging $3/pc minimum, which no one would pay. And the thought of someone ordering 1000 cases to be converted would be enough for me to want to jump out a window lol
For reference, I think places like Hunts charge $0.50/pc just for a single hyrdoform op, and I believe IDOD was saying he might offer a single ID/OD neck turn for $0.75-0.95/pc.
I'm sure the optimized process and equipment will help get the time down if you keep doing it from Lapua brass. With anything like that though, you gotta ask "what's my time worth?" Even if you could get that down to 2min per case (doubtful with all the touch time listed), that's only 30 pcs/hr. So if your free time is only worth $15/hr then you could charge $0.50/pc for the conversion. If it was me, I'd be charging $3/pc minimum, which no one would pay. And the thought of someone ordering 1000 cases to be converted would be enough for me to want to jump out a window lol
For reference, I think places like Hunts charge $0.50/pc just for a single hyrdoform op, and I believe IDOD was saying he might offer a single ID/OD neck turn for $0.75-0.95/pc.
Seems like a lot of added time for possibly minuscule results. If you figure you usually need around 500pc or more for a good lot to shoot matches and what not. That’s almost 17 hours of work. I mean, if the only brass available was shit like Federal and Winchester it would be different but both Hornady and Alpha are quality brass makers. Me personally would rather save the time and shoot more. Beside, if the GT turns out to be as hot has it’s proclaimed to be in sure Lapua will jump on the wagon if they see the market for it.
On a side note I have the Gen 2 Henderson trimmer with a motor. It is easily the best trimmer I've ever used. I know there are a lot of Giraud fans but it's amazing how fast the Henderson can be and it's really easy to switch out cartridges and calibers
What velocity are shooters getting with alpha brass without pressure ?
Are you using a expander mandrel?What are people running 108 eld’s at velocity wise with H4350?
I loaded 37.3, 37.5, 37.7, 37.9, 38.1 and shot them today. A few groups were great but had fliers (possibly me) the numbers were also not that great. Lowest SD I was able to achieve was 5.7
velocity was 2940 at 37.3 up to 3040 at 38.1.
29” barrel and Alpha brass.
Once fired Alpha, wet tumbled, Amp annealed , resized with Redding die with the expander.Are you using a expander mandrel?
What are people running 108 eld’s at velocity wise with H4350?
I loaded 37.3, 37.5, 37.7, 37.9, 38.1 and shot them today. A few groups were great but had fliers (possibly me) the numbers were also not that great. Lowest SD I was able to achieve was 5.7
velocity was 2940 at 37.3 up to 3040 at 38.1.
29” barrel and Alpha brass.
Gents - can someone please let me know the recommended trim length for 6GT, or length of new Hornady or Alpha brass? I'm having to make my first cases from 6.5x47 and I've never seen a 6GT in the wild down here. I might have missed it somewhere. If so, apologies.
Gents - can someone please let me know the recommended trim length for 6GT, or length of new Hornady or Alpha brass? I'm having to make my first cases from 6.5x47 and I've never seen a 6GT in the wild down here. I might have missed it somewhere. If so, apologies.
Thanks gents. Greatly appreciated. I’d looked at the reamer print but didn’t know what a safe margin might be.
@Dthomas3523 - on the steps you’re following to form 6.5x47 to 6GT, do you do a trim to length after the initial sizing down run?
I’m lucky enough to have a Henderson trimmer but I can see it taking quite a bit of time...
For saami specs generally the max case length will be .010 from the end of the neck before it transitions down.Thanks gents. Greatly appreciated. I’d looked at the reamer print but didn’t know what a safe margin might be.
For saami specs generally the max case length will be .010 from the end of the neck before it transitions down.
So 1.732 minus .010 gives us 1.722 max. Then the spec will say something along the lines of -.020 meaning that up to .020 below that number is still in spec. So the trim length spec would be 1.722-.020 meaning anywhere from 1.702-1.722 is in the range.
View attachment 7307247
Currently my steps:
Run into a 6x47 non bushing die (I run 6x47 as well so I have one) to take the neck down.
Then I run in 6gt die without bushing, halfway down, spin case and finish sizing.
Then trim to length and inside ream. Outside neck turn if its still too thick for the chamber.
Size with appropriate bushing and mandrel
Fireform/practice with 31.0 varget.
Neck turn to desired thickness if need be after.
I’m still experimenting with this process and it will likely change.
Thanks - appreciate it. I’d thought to subtract about 0.015“ to 0.020” from the 1.732” figure so good to see I wasn’t completely off base.
Good info - cheers. Was this on the Hogdon site or similar?
Good info - cheers. Was this on the Hogdon site or similar?
Ok - this looks pretty different from where you started, process-wise? Did you go for inside reaming to cut out process steps of mandrel expand and outside turn, or were you finding latter wasn‘t getting rid of donut at base of neck?
Neck still needs to be trimmed down. Just seated a 109 hybrid to double check loaded diameter.
View attachment 7308789
just curious why you need to turn it more when your running a .273 reamer? or did i miss something when i didnt read word for word?
I run .006 clearance on most everything. .003 is fairly tight.
Not sure where/when “no neck turn” reamers with .003 or less clearance became standard.
I run .006 clearance on most everything. .003 is fairly tight.
Not sure where/when “no neck turn” reamers with .003 or less clearance became standard.
S
Some dudes find out that the guys chambering their barrels, is using a tight neck diameter, Right @lte82 LOL
My 6x47L is a .2755...
Update on making lapua 6gt. Now that I have pretty much everything I need, I just spent a few hours perfecting the process. I think I have it down. It sounds like a lot, but with the right stuff, it’s not bad.
Run virgin 6.5x47 into SAC 6gt die without bushing. Twist 1-2 times in process in attempt to maintain some sort of concentricity.
21st turning expander mandrel (.240)
Inside ream with IDOD (just enough for the 21st turning mandrel to pass properly). Finding IDOD doesn’t do well with brass that isn’t concentric. Neck thickness was all over the place
Outside turn with 21st lathe (the strength of a mandrel and floating Chuck is when brass isn’t concentric)
Neck comes out at .012 and hugs a .241 pin gauge perfectly without any feeling of a donut.
From here is just trim/chamfer/deburr and load. I’ll probably add the trim/cham/deb after the IDOD reaming.
.012 neck wall works out to a .267 loaded neck diameter which is just about perfect at .006 neck clearance. .006 is what I shoot for on most everything.
How is the inside neck reaming operation done on the IDOD? I don't have the IDOD option down here (or justifiable need) but have just noticed the same donut issue on the prototype case I've made. Despite use of expander mandrel, case will not slip over 21c neck turning mandrel. Donut is visible under high mag loupe and also with gauge. I'm going to need to use a 6mm Wilson inside neck reamer as that's about the only option I have..