mrjashu
Well-Known Member
I shoot the 143 HH in a 22" brux barrel. Using H4831 I hit pressure at 3250fps. I have a good node that I'm using at 3150 fps.
I'm struggling to wrap my eyeballs around this level of speed. I'm getting around 3250 with 140g absolute hammers and RL16. My action isn't the stoutest and it's got a barrel nut instead of shoulders, and I know every barrel is different, but my god. Is RL 26 really that magical in the SAUM? Or am I missing something? DO you shoot conventionals in any of the SAUMs, are you getting bananas speed out of that?This was the ladder I ran on them with no pressure. Every barrel is different. And what's really gonna blow your mind then if the velocity does is that it shoots under 1/2" at 300 yards. Multiple .1 moa groups. Verified the drops out to 550 yards at 6.9 moa.
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I'm struggling to wrap my eyeballs around this level of speed. I'm getting around 3250 with 140g absolute hammers and RL16. My action isn't the stoutest and it's got a barrel nut instead of shoulders, and I know every barrel is different, but my god. Is RL 26 really that magical in the SAUM? Or am I missing something? DO you shoot conventionals in any of the SAUMs, are you getting bananas speed out of that?
I hope I'm not hijacking, I'll add my data later.
Oh I definitely believe you, just jealous. What action, brass and primer? That's great. Those are big jumps, which tells me you knew the combo was a screamer ahead of time, that's I was hoping for similar results with the AH but it didn't happen. Thick ol brass, thin action (savage small shank). Accuracy is outstanding as you say, but start of pressure was 61.5g RL16. 3240 fps in 24" barrel.View attachment 397923
This is the work up I did and recorded. First you see me skipping grain charges and jumping ahead because I knew I was ways away from pressure. Second I never hit pressure. I stopped cause I didn't think I would hit that mark. Third I backed down .5 grains from where I stopped and shot groups and ES SD. I do remember it was single digit ES. The barrel at this time had around 60 to 70 rounds. Now it's on around 200 and has speed up. 4th note you don't see is that data was not crimped. I added a 1/8 crimp to the load. So I'm not sure if the crimp added that little extra speed or the barrel sped up.
I understand you can't wrap your head around the idea but it happened and it continues to happen. I can pull that rifle out of the safe set it on the bench 20 yards away and shoot 300 yards and if I do my job it will be under a 1/2" at that that distance. My drops at 300 yards was 1.6 moa, 550 yards is 6.9 moa. So the drops confirmed my velocity also along with the LabRadar.
Well I'm sold then. The magic will be if I can find it in real life. MY ES is not very good and I was about to blame the f210m, but that's obviously not the case.Recipe is:
ADG brass New
F210M
RL26 67.0 grains
Ogive 2.183" = .106" off lands. I was crimped in first band from tip.
AntiX action and 8.4 twist Proof prefit barrel.
Try RL26 reason I say is cause I had a 6.5 max and shot 123 absolutes in same method 69.5 grains at 3,510 fps avg. it was 100' faster than any other powder. I'm gonna bet you see majic.
We will see after I test. Hodgdon manual update has a lot of new data on 65Staball. Going to run both. I've got a lot of choices of powder but that's where I will start.Then I'd pick RL23