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Lyman book (49th edition) shows
using 230gr. TMJ;
231 powder: 5.2 gr. -5.8 gr (max load);C.U.P. 16,200:
velocity 768-849 fps
AOL @ 1.275"
using 225 gr. JHP;
SR-7625 powder : 4.4 gr - 6.3 gr (max load); C.U.P. 17,400;
velosity 587-844 f.p.s:
AOL @ 1.243".
I am loading
230 gr JHP;
231 powder: not shown. but next fastest on burn chart is
SR-7625 : 4.4 gr. - 6.3 gr (max load); AOL @1.243"
So question is: with 231 Burning at #21 on list in book and SR-7625 being
# 23 in book,
Where do I start with my load? In the middle (5.2 gr 231 is my guess).
But being HP they should be shorter than the 1.275" that it shows for the TMJ. I already know they won't cycle in my magazines at 1.275. I'm down to 1.260 and they are starting to cycle better but need to be a little shorter. but do I need to watch the C.U.P ( cartridge under pressure)?
The more I push the bulet in the more C.U.P. I'm putting in the chamber , right?
Am I on the right track or am I missing something ?
Any insight would be appreciated.:bow:
using 230gr. TMJ;
231 powder: 5.2 gr. -5.8 gr (max load);C.U.P. 16,200:
velocity 768-849 fps
AOL @ 1.275"
using 225 gr. JHP;
SR-7625 powder : 4.4 gr - 6.3 gr (max load); C.U.P. 17,400;
velosity 587-844 f.p.s:
AOL @ 1.243".
I am loading
230 gr JHP;
231 powder: not shown. but next fastest on burn chart is
SR-7625 : 4.4 gr. - 6.3 gr (max load); AOL @1.243"
So question is: with 231 Burning at #21 on list in book and SR-7625 being
# 23 in book,
Where do I start with my load? In the middle (5.2 gr 231 is my guess).
But being HP they should be shorter than the 1.275" that it shows for the TMJ. I already know they won't cycle in my magazines at 1.275. I'm down to 1.260 and they are starting to cycle better but need to be a little shorter. but do I need to watch the C.U.P ( cartridge under pressure)?
The more I push the bulet in the more C.U.P. I'm putting in the chamber , right?
Am I on the right track or am I missing something ?
Any insight would be appreciated.:bow: