Throw them in a calculator, measure bullet length minus the poly tip length, if you're at 1.4 to 1.5 bet you're stable. I can send you 20 in the mail to shoot on paper at 100 then 400, look for keyholes. I will add, most my consistent/accurate shooting rifles rifles have a stabilization of 1.6-1.8 on sg scale.
Just wrapped up..
Do you have any idea what the difference is between your die’s neck size and the OD of your necks coming out of it, with no expansion?
Awesome. Im sure I’ll be fine with 80’s im hoping it will stabilize the 85’s and 88’s just to try them. My goal is the 75’s or 80’s though.
Micrometer with a flat anvil. It’s pretty consistent across cases, and I average the readings taken 90° apart, but they’re consistent too, within generally 0.0002”
I’ll be honest, and a bit blunt. It’d help me if we could focus on the question I asked. It sounds like you haven’t measured what I’m after, and that’s fine; if you happen to take the extra step in your process the next time you resize brass, I’d love to know what you find. Appreciate it!
That’s what I did with this setup also, but was getting almost no sensation when running my mandrel after the first firing. Come to find out I’m getting what *seems* like a lot of spring-back, but honestly I never check it on other cartridges so I don’t know what’s normal.
Did you anneal? Taking 6br necking down, then expanding, fireforming, then going to resize has had quite a bit of work hardening. Annealing will help reduce springback if you haven't done so.
Yes, I did, after the first firing. It’s possible I need more flame time, but it would be great if someone else could tell me how much spring-back they’re getting in their process so I can know if my situation is abnormal or not.
Heck yeah! I know I'd shot better from a solid rest. Hopefully conditions are calmer this evening and I can test more at 40, 42.5, 45, 47.5 50 jump maybe set up the labradar as well. Spring thaw is upon us and I never brought a shooting mat to work, so prone isn't going to happen. Truck tailgate is all she's gonna get at the moment.
I would guess it might speed up as my 26" Benchmark 1:7.5 with 27.0 grains of Varget pushes a 85.5 at 3,040 and the 88's right around 3,000 fps. In loading OCW i ran it up to 29.1 grains of Varget before seeing any pressure
I had loaded up one 85.5 with 28.3gr varget for finding lands, as well as 90smk, 90 atip, 88 eldm. All 4 bullets were 2950-2970, the 4 shot group had the two Hdy and one sierra all touching at 100y, where the Berger was high left.
N150 makes velocity equal per grain in my 6gt and 6dasher. I guess I haven't tried it in the 22br yet.
My 22bra should be done in a few days and I’ll be starting with n140 and n150 with 75’s to try. Once it gets here I’ll post my experiences
Buy more brass, depending on what shooting disciplines you pursue; 150 is barely enough to shoot a one-day PRS match, and not enough for a two-day or a training session and zero confirmation before the one-day.
I shoot prs with a 6br. I wanted to try out the peterson brass to see if it was good, or should I use alpha. I do however plan to use the 22br for some matches.
I use alpha 6bra, and there are some problems with the common reamers at the 200 line, lapua chambers are bigger at the base, the alpha brass is so hard at the base it won't expand and grip chamber. I just had a new barrel cut with a alpha 6br chamber and I'm still getting bolt thrust/lift issues. Lapua is the gold standard on 6br brass, use it if you can.
Everything BR based from Alpha has been OCD I believe(maybe not dasher from 2021). My BRA is from early 22, I know their dasher brass is good to go. But BRA has been a problem. I'm still breaking in my alpha spec chambered barrel, but 31gr varget is giving random bolt lift with 108bt going 2850 from a 28" barrel. Light load. However my old barrels ammo with 33.4gr H4350 was running 2930 with 105s and no lift. Weird shit........
Peterson will be fine in the common chambers being used in the precision game. Alpha ocd has such a hard base, it will not expand enough to grip a chamber that's large base. This is only a problem with the BR variants. I've used a ton their OCD 6gt and creedmoor, and I believe the longer case wall gives more grip. However their brass is best used in min saami reamers, factory rifles such as a Tikka, bergara, whatever will likely have oversized chambers and will not work well with alpha OCD brass, I highly recommend lapua for those applications.
Neck sizing die doesn't size body of case, that's fine for intial neck down. But once you start sizing after first firing, a FL bushing die utilizing 002-003 shoulder bump has become the more common desired method of brass sizing.
FL die shouldn't be sizing case much, if at all. Just set the die up high enough to not bump shoulder and it'll basically act like the neck die.
