- Thread starter cjherrman
- Start date
How much H4895 you run?
Lapua has more capacity than Alpha
Yep, with better actions, rifles, & brass you can’t always read overpressure by typical brass markings or bolt lift. You can probably go over SAAMI specified max without seeing physicals signs. What constitutes safe May not be the same for all. I personally would rather not go over SAAMI max as I have found with good wind calls 100 fps doesn’t really matter that much.
Accurateshooter has a big thread with load data on the 6BRA. So if no one chimes in here, I would have a gander at the thread going over there.
Just keep in mind that BR shooters like to run on the high side of pressure, and their rifles don't get exposed to adverse conditions and gets dirty and wet like ours. So I would recommend working up a load that's more conservative then what you will find over there.
Has anyone played with 90grain ELDX with Varget? I am running 103's right now at @ 2900 with 30.6 of Varget. I would like to push the pretty hard this is out of a 20'' coyote rig. I will do load devlopment, just seeing what others have had before I order 90S
I'm bringing this thread back
Looking for some data and velocity with 112 match burners
Looking for some data and velocity with 112 match burners
I'm betting you could get 2800 easy with the 112s and ~30gr varget. MBs have shot really well for me out of an XC and x47 in the past. I have about 1200 on the shelf. I wouldn't mind seeing anyone's data on them either.
112 Match Burner, MHSA 6BRA barrel, 24"
Lapua brass, 2.456" COAL
RL-16: 28gn, 2398 fps - 30.1gn, 2562fps
8208XBR: 25.5gn, 2449fps - 28.2gn, 2717fps
I had room to add a little more RL-16 in the case, but figured it was too slow to make it worthwhile even with an extra 2gn.
8208 pressured out and I didn't want to go higher - I actually shot it around 26.6gn and it groups fantastic, just unacceptably slow.
ca. Aug '21, so no extreme cold temps to skew velocity.
I think the 112 is a better bullet than the 105, but it's just too heavy for the little BRA case. It might get there in a dasher, but IME it's best suited to the CM/XC sized cases.
Lapua brass, 2.456" COAL
RL-16: 28gn, 2398 fps - 30.1gn, 2562fps
8208XBR: 25.5gn, 2449fps - 28.2gn, 2717fps
I had room to add a little more RL-16 in the case, but figured it was too slow to make it worthwhile even with an extra 2gn.
8208 pressured out and I didn't want to go higher - I actually shot it around 26.6gn and it groups fantastic, just unacceptably slow.
ca. Aug '21, so no extreme cold temps to skew velocity.
I think the 112 is a better bullet than the 105, but it's just too heavy for the little BRA case. It might get there in a dasher, but IME it's best suited to the CM/XC sized cases.
Well that sucks... they've been awesome in my 6 creed, was hoping to go BRA when the barrel is toast but I may have to look at the 6GT
I can’t help with any matchburner data, but I think you will be happy with a 6 bra or 6 GT. I’m shooting both & they are both awesome. On my 6 bra I gave up on Alpha brass and am fireforming Lapua in a barrel that Alex Wheeler chambered for me. It’s the most precise rifle I ever shot except a 6 GT I put together from Impact Precision with Wade Stuteville chambering. Bought everything through them using advice from Tate Streater & Khianna. Though, on the 6 GT I wasn’t fireforming. I don’t know how my 6 bra is going to be more accurate after fireforming. It’s just one solid hole on a 10 shot string. I’ll post a pic if I can find it. Doesn’t look that great, but it’s off just a bipod without a rear bag.
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BRA, it’s just a fireforming load for a BRA Alex Wheeler chambered for me. No load development. I had given up on another bra barrel reamed with an alpha reamer & using alpha bra brass. I still have 100 more pieces of Lapua BR to fireform before starting load development. I had heard people shot matches while fire forming, but it was hard to believe. This is my 1st time to fire form. I do have a 6 GT that shoots as well.
I’m getting a 6bra 7.5 twist barrel spun up from PVA as we speak. From what I’m reading 30 grains of varget should be a good fire forming load with 105 class bullets? I’ll be using Peterson brass.
That was my fire forming load as well.
I bought a few jugs to try in my 6 GT, but looks like it should do good with the 6 BRA. I’ll be testing soon & will post results afterward.
Curious as to why you'd go Peterson over Lapua.
Good point, though a friend of mine is getting a BRA done and is thinking about buying Lapua 6 BR ammo. At a little over $2.60 per round vs $1 per case + $.25ish per primer + $.60ish per projectile + $.20ish for powder, you're at more than $2.00 and you're spending the time to do up forming rounds.
The good news with fireforming BRA is that it's stupid simple to FF, and accurate as heck.
First firing is really accurate 6BR, second firing is slightly faster BRA.
Nothing to lose.
I plaid the bra game with alpha brass and it was frustrating trying to find a reamer(used lapua and alpha spec) with alpha brass. I tried 3 different sizing dies, and I had bolt thrust, lift, ejector marks all with 105-108gr bullets at 2850-2830 from two a 28" 237 bore 7.5tw HH barrels. I sold all my bra shit away, recut them to 170fb 6gt, shooting 115 dtacs at 2850. I think my issues would disappeared running lapua brass, but I'd already invested 1k pcs alpha. Running these short walled cases with low taper and sharp angles def requies chamber/brass relationship to be correct for it all to jive well, especially with the hard ass alpha ocd case head.
Seems like a lot of people on accurateshooter report issues with Alpha brass and 6BRA.
It's an easy and forgiving cartridge with Lapua brass.
I've never had any issues with my Alpha brass. I guess my smith just got it right with his reamer choice. He's been shooting the same reamer specs with Peterson and 105s and it's been great for him too. Sucks to hear it didn't work out well for some here. New components for a different cartridge aren't cheap, especially if you're doing 1k brass pieces at once. Yikes.
I’m on my 10th reload, two barrels, Alpha brass, Whidden dies and JGS BRA #1 .272 reamer- still shooting in the low 2s.
I don’t understand the problem.
(The attachment is from load development, from 29.5 - 31.5 gr Varget in .03 steps - so every 5th shot. Second barrel just stayed with 31, shoots just as well. About a grain less for 4895)
I don’t understand the problem.
(The attachment is from load development, from 29.5 - 31.5 gr Varget in .03 steps - so every 5th shot. Second barrel just stayed with 31, shoots just as well. About a grain less for 4895)
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Here's a thread on accurate shooter in regards to early pressure issues with Alpha brass:
