It's a trigger tech special in an American rifle company CDG, it's got the trigger hanger so timing is easy to adjust.
Your brass is growing near 0.010" and your seating primers 0.008" deep. I'm not surprised you're getting light strikes. Lapua brass shouldn't be 0065 short of gauge, then ur Smith cuts to go +003? Headspace sounds a bit deep. Stop seating your primers -008, only go to flush or max of -002 until your brass is formed.
That's kinda what I though with the tolerance stacking. I cut the chamber but didn't think it was long but the numbers don't lie.
The headspace isn't a big problem other than the fireform pains. Lapua is tough stuff and likely won't be fully formed for a few firings. Primer depth will make a difference on consistency of ignition.
Jackomason: Was halfway through a reply this morning before I was interrupted by work (screw them dead lines). My thoughts are pretty much the same as 406Shootist. I'm just recently getting into primer depth seating testing. My Lapua brass has primer pocket depths of 0.127", CCI 250 primer depth is 0.125". Seating the primer -2 or -3 thou would bottom out the anvil and seems more appropriate. I haven't fired the Lapua brass yet, but the Peterson brass has very similar dimensions and consistency. New Peterson brass base to datum line = 2.023", Once fired dimension = 2.033". So the growth is close to yours. Of course your dimensions are probably different and like you, my measurements were with calipers, so there's some plussing and minusing going on.
As a side note, I'm retiring the Peterson brass after 8 firings. The last batch of ammo I shot had 9 firings and out of 30 rounds, about 7 had significant case head separation. But there were some hot loads run during load development. We'll see how the Lapua does.
Good Luck
As a side note, I'm retiring the Peterson brass after 8 firings. The last batch of ammo I shot had 9 firings and out of 30 rounds, about 7 had significant case head separation. But there were some hot loads run during load development. We'll see how the Lapua does.
Good Luck
I just chambered a barrel and set headspace to my current lot of Peterson brass. The other 300nm I have on hand is chambered by Bartlein with an identical reamer and headspaced to the gauge. That barrel is .010” deeper than the one I did.
Saami was recently released. The 0.455 shoulder headspace datum line has a 0.010 range. Seems a bit excessive. If I were chambering a new 300nm barrel I'd prob use a new piece of brass as go, and chamber 0.003 deep of that.
Yes, it’s a good fit for the lighter bullets. N565, N568, and N570 are all very well suited for .300NM.
Ive looked all over the internet and can't seam to find anything on 245 eol bullets in a .300 norma with H1000. Seems like most guys are running N570. I have a couple jugs of h1000 and would like to stick with that if possible. Does anyone have any loads they would like to share with this bullet powder combo as well as velocity they are getting? I'm using Lapua brass. Thanks
H1000 works great with the 215 gr. bullets but it's a bit to fast for the heavies. I can't find N570 so I've been using H50bmg and Staball HD(same burn rate as Retumbo).
N570 just dropped at a bunch of places. PV has a crazy good price for the 8lbs jugs.
www.powdervalley.com
Vihtavuori N570 Smokeless Gun Powder | Powder Valley Outdoors
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Any experience/ advice on loading for a 22” bbl’d 8 twist standard Norma in a hunting configuration?
Plenty of h1000, retumbo… still about 2 months left on my build, but I can’t stop thinking about loading.
Kelbly Nanook
22” ace 8twist
Manners Nimrod
UM bottom metal/ TT special
This is what is spec’d out at the moment. Wanting to run suppressed, hence the 22”
Plenty of h1000, retumbo… still about 2 months left on my build, but I can’t stop thinking about loading.
Kelbly Nanook
22” ace 8twist
Manners Nimrod
UM bottom metal/ TT special
This is what is spec’d out at the moment. Wanting to run suppressed, hence the 22”
Very interested in hearing your results with the ace barrels. They look like a great option with a great price. I'm guessing Unknownmunitions doing the work I also interested in hearing your thoughts on them.
Heard nothing but good about Ace barrels. First one for me, but the first time I heard about them was from Bruce Thom at BAT machine. He was using them and recommended them. (Pretty good recommendation)
Unknown is doing the work. First met Jake and his wife when they were working out of their garage They’re about 2 miles from me. Awesome shop. Good people with a passion and doing business in a way that they’ll be successful. Knowledgeable and helpful staff all around.
Unknown is doing the work. First met Jake and his wife when they were working out of their garage They’re about 2 miles from me. Awesome shop. Good people with a passion and doing business in a way that they’ll be successful. Knowledgeable and helpful staff all around.
Probably already been addressed at some point, but ask anyways:
For 300 Norma Mag Lapua brass, what size neck bushing do you all find to be best?
Got a new Barrett MRAD 300 Norma barrel and I want to start working up a load, but I got to get a neck bushing die first and I don't want to get the wrong one.
For 300 Norma Mag Lapua brass, what size neck bushing do you all find to be best?
Got a new Barrett MRAD 300 Norma barrel and I want to start working up a load, but I got to get a neck bushing die first and I don't want to get the wrong one.
Just recently started using the Lapua brass bought in early 2021. Brass with one firing, neck OD with bullet = 0.339”. Which would work out to a neck wall thickness of 0.0155”. Been using a 0.337” bushing followed by a 0.306” mandrel to make the hole more uniform/consistent. No guarantees your brass and measurements will be the same. Usual disclaimer … YMMV.
Just started playing with my buddy's 300NM. It shot great with factory 230gr Norma stuff, but all he had for supplies when he dropped the rifle off with me was 215gr Berger Hybrids and H1000. He has 230gr Hybrids and N570...but that doesn't help when you don't bring it 
.
Anyway, just did a few rounds at 2.800 CBTO (.060 off), and worked my way back in .010 increments. I used 82gr of the H1000 as a safer starting point with CCI 250s. Third group showed promise (100 yards) at 2.780 CBTO.
I grabbed my inertial puller and hammered the next set out before re-seating at 2.780. I had to take a break, but got back this afternoon to test fire again, and was happy to see this despite the wind picking up a little.
I'm still cautious, but I'll try this at a bit of distance and see if it continues to hold up. I also need to get it over my chronograph and bump up charge weight until either the accuracy goes away or the velocity gets to where I want it.
It's a good start
.Anyway, just did a few rounds at 2.800 CBTO (.060 off), and worked my way back in .010 increments. I used 82gr of the H1000 as a safer starting point with CCI 250s. Third group showed promise (100 yards) at 2.780 CBTO.
I grabbed my inertial puller and hammered the next set out before re-seating at 2.780. I had to take a break, but got back this afternoon to test fire again, and was happy to see this despite the wind picking up a little.
I'm still cautious, but I'll try this at a bit of distance and see if it continues to hold up. I also need to get it over my chronograph and bump up charge weight until either the accuracy goes away or the velocity gets to where I want it.
It's a good start
Anyone load any 120gr bullets? Ive got a box of solid copper 120s here and thought they would be fun on coyotes
One quick test at 385 today on the load from two posts above. Only four shots. Looks like it is holding up though right at a half minute or so for all the grouos so far. I dialed 1.3 and still hit a touch high (measured scope height is 2.9"). Perhaps this is doing a touch better than the 300WM - velocities I was suspecting with only 82gr H1000.
Either way, I'll shoot it at 655 in the next week or two to finalize as well as true velocity. If it stays the same, I'll load the rest of my buddy's components up for him and call it good.
Either way, I'll shoot it at 655 in the next week or two to finalize as well as true velocity. If it stays the same, I'll load the rest of my buddy's components up for him and call it good.
I've been messing around with the Berger 215 Hybrid Target and H1000 but in the improved version of the 300 NM. A ten shot group averaged 3135 fps ES 9.5 and SD 4.1. This was down a 30 inch barrel and a charge of 87.5.
Since I couldn't find much info on 245's and H1000 I figured I'd post up some results to help others who may be interested in that combo. This was from a remington varmint contour 8 twist 28" long on a lightweight hunting rifle.
94gr RL23 under a 125gr cutting edge Maximus
Please shoot a prairie dog with that...for science and stuff
I ran those in a 17 twist 300wsm. Pretty quick too. I would try them in a Norma with a real slow twist
I would look at my dies on the inside and see if there's any marks if not then have your smith polish out the chamber. It won't hurt anything unless it's really rough but just will mark your brass up
If you are having trouble ejecting that brass it is likely due to a bad spot in the chamber. From what I see in the picture it is likely just from the die.
Clean the inside of the die to be sure you haven't gotten a little dirt or carbon build up in there and see how brass looks then.
Overall, unless it is causing a problem with ejection, I would not worry about it. Some of what you see is very normal.
I need help here:
300 Norma Mag with Lapua brass and a .336 bushing.
Ordering a mandrel body expander this week, but I don’t know what size to get to give me .002 neck tension.
I know I am supposed to do all the measurements myself, but if anyone uses Lapua brass, I’d love to hear what size bushing and mandrel expander you are using for your preferred neck tension.
300 Norma Mag with Lapua brass and a .336 bushing.
Ordering a mandrel body expander this week, but I don’t know what size to get to give me .002 neck tension.
I know I am supposed to do all the measurements myself, but if anyone uses Lapua brass, I’d love to hear what size bushing and mandrel expander you are using for your preferred neck tension.
I run a .334 bushing because I had one, and a .3065 mandrel. I have the Forster mic and it appears to be right at .002 neck tension.
I would buy all their .30 caliber mandrels and experiment with whatever neck tension gives you the best consistency and accuracy at 600 yards or more. They sell them in .0005 increments and just assuming .002 of tension will work best, may not be the case.
However, if you're set on running .002, I was using a custom Forster sizing die honed to .3055 and I found running a .306 mandrel after sizing, gave me better groups and ES.
Much appreciated posting these results, I just dumped money into the EOLs prior to reading about H1000 vs. N570 for heavy pills. I have H1000 on hand, have the same barrel specs except its a heavy rifle.
Curious what your seating depth/die combo is?
Just found out my Lapua brass necks is about .017 thick. So, with a .336 bushing, I should get a .302 mandrel since .017*2=.034 and .336-.034= .302? Am I missing something?
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