Just got this powder dispenser, and measured out a load at 57 grains and then tested it against a manual scale to cross check. The manual scale was saying it was over 57 grains. Do i need to change something on my scale? Which scale do i trust? Also this is my brass from that load, its 1 grain down from max. Not sure whether i should move down or if the pressure looks fine.
For more context: im wondering if there is pressure signs if the load was actually above 57 grains due to something with the hornady auto charge. Group shot well though, .78 MOA.
Trust the manual scale.
I would say to recalibrate the Hornady and then see what they look like compared again.
Yeah, I’d calibrate the Hornady and see if it reads the check weight correctly.
The brass looks fine other than a tiny crater on the second shot. Any heavy bolt lift?
Recalibrated tonight and was spot on!
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No heavy bolt lift! So would you go down a half grain or do you think my pressure is fine there?
My Hornady scale came with weights to calibrate the digital scale. Use those weights on the manaual scale to check it.
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If you aren’t getting heavy bolt lift it’s probably fine. I see a little something weird on that second piece of brass but it’s not bad and usually the bolt lift is the tell-tale sign.
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Okay thanks! If i go down half a grain just to be safe, i shouldnt experience a change in group size with that small of adjustment?
Possibly…each barrel is different. My 308 tightened up to 1/4” groups by dropping .26 grains and my 6.5 Creedmoor the group opened up about 2/3”. Sorry, but just try it out and see
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Thank you!!
Are those ejector swipe marks at 10 o’clock on each of those cases? Also, does the middle case have more primer cratering than the others?
Half a grain can change things. First thing I would do is load another three and shoot them at the exact same target to see how the grouping holds up - is it the same size or smaller, and does it print on top of the first group. If you don’t have problems, and it is consistent, run with it. If you think it does have pressure, then I would drop it 2 tenths of a grain and see what happens. I know everyone want .500 groups or better, but 8 x .750 = 6 inches or a 6 inch group at 800 yards…
good luck
good luck
Ok now im really confused. Loaded 3 more at 56.5, 56, and 55.5. Now im getting bad ejector marks. The three on the left are the first three i shot at 57. So not sure why im getting pressure signs now.
Shoot 55 grains and see what you get.
It would help if you told us something about the grouping size and pattern for the each of the loads also.
If you have another powder, try a load that gets you to the desired velocity you want. Another powder may act totally different from a pressure standpoint, but still get you the velocity.
What kind of beam scale?
Ok, so went back to what I think was your original post on this issue.
Barnes data for a 127 is 58.3 (i think) max for H1000.
I don’t reload the 6.5 PRC, but it is very close to the 7 Rem Mag in performance. I do load the 7 Rem Mag, and H1000 is a pretty slow powder for light bullets, generally used for heavier 168 grain and up loads in the 7 RM. Not saying it cant work, but a powder that is a little quicker might work better. Copper bullets are known to generate higher pressures, but not a reason to shy away from them.
IMR 4350 may work for you in that case with a light bullet like a 127.
Good luck
Thanks! Jim said i wasnt getting any pressure signs, and that was shooting decent groups at 56 so i may stick with that unless i start getting heavy bolt lift.