CIP 7.65 Browning
https://bobp.cip-bobp.org/uploads/tdcc/tab-iv/tabivcal-en-page12.pdf
SAMMI 32 ACP
https://saami.org/wp-content/upload...FP-and-R-Approved-2015-12-14-Posting-Copy.pdf
I have an old CZ-70 marked for 7.65 Browning. I finally found a reference shown above for 7.65 Browning, not 32 ACP. They actually show a .309 bullet diameter, not the .3125 shown in the SAMMI specs.
I actually ordered some Berry's that are .312 and 71 grain to try reloading for this, and not sure they are the correct spec, since everyone on the net seems to say 32 Auto and 7.65 Browning are the same, these references seem to show different. I haven't looked through all the other dimensions to look for variations, but I anticipate there are other variances. The bullet diameter seems to be a big one.
I'll have to pull out some factory ammo and do some measurements. .0025 over in bullet diameter seems like a lot. I'm pretty new to reloading, but if the spec is .001 over to bore for standard bullet sizing, the excess diameter to bore spec, then would be 250% additional diameter than the .001, and that seems like a lot when I look at it that way.
CIP chamber mouth H2 1) = 8.55/.336
SAMMI Chamber mouth 8.61/.338
Yea, the chamber dimensions also show a .002 difference. So, what impact would using a bullet that is .0025 larger than the correct spec cause?
Is there a source for .309 bullets for this at 71 or 73 grains? I haven't been able to find any.
https://bobp.cip-bobp.org/uploads/tdcc/tab-iv/tabivcal-en-page12.pdf
SAMMI 32 ACP
https://saami.org/wp-content/upload...FP-and-R-Approved-2015-12-14-Posting-Copy.pdf
I have an old CZ-70 marked for 7.65 Browning. I finally found a reference shown above for 7.65 Browning, not 32 ACP. They actually show a .309 bullet diameter, not the .3125 shown in the SAMMI specs.
I actually ordered some Berry's that are .312 and 71 grain to try reloading for this, and not sure they are the correct spec, since everyone on the net seems to say 32 Auto and 7.65 Browning are the same, these references seem to show different. I haven't looked through all the other dimensions to look for variations, but I anticipate there are other variances. The bullet diameter seems to be a big one.
I'll have to pull out some factory ammo and do some measurements. .0025 over in bullet diameter seems like a lot. I'm pretty new to reloading, but if the spec is .001 over to bore for standard bullet sizing, the excess diameter to bore spec, then would be 250% additional diameter than the .001, and that seems like a lot when I look at it that way.
CIP chamber mouth H2 1) = 8.55/.336
SAMMI Chamber mouth 8.61/.338
Yea, the chamber dimensions also show a .002 difference. So, what impact would using a bullet that is .0025 larger than the correct spec cause?
Is there a source for .309 bullets for this at 71 or 73 grains? I haven't been able to find any.
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