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Old September 4, 2017, 12:24 AM   #11
44 AMP
Join Date: March 11, 2006
Location: Upper US
Posts: 20,143
Bullets: Remington 50gr FMJ
Powder: HP-38, 1.3gr (Hodgdon says 1.3 to start, 1.5 max)
Hornady 7th edition (the first book I could find .25acp data in),
50gr COAL 0.900

1.0gr start, 1.3gr MAX

max load 850fps

test gun
Beretta 950BS
barrel 2 3/8" 1 in 10 twist

What gun are you using?

All of the .25acp that come to my mind are blowback guns. They don't lock shut, so, there's nothing but the inertia of the slide and a bit of spring tension to keep the pressure from comin' right back atcha!

Also, the small guns have their chamber a bit closer to you hand, so you really don't want to overload a case.

Good Luck!
All else being equal (and it almost never is) bigger bullets tend to work better.
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