I just got a 25 in 45colt & 45acp. The Acp ammo was cast 230gr
cast WCs, the 45Colt was 242gr WCs. Both loaded at approx 800
fps. The 25 in 45acp out shot the Colt by a wide margin. These
guns have 6-6.5" barrels. The same load in 45Colt shoots with
bullseye accuracy in my 25-5, 83/8" gun. I came home cleaned
guns and checked chamber throats and don't see any issues. I
read a lot on the problems with chamber throats on 25s in 45C.
What are other things to look for? Gun actually shot better with
Win factory Jacketed ammo.

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All the Model 25s,not just the ones in 45 Colt,made prior to when the serial numbers changed from N prefix to the alfa numeric serial numbers are suspect.

Dropping different size plated or jacketed bullets between .452" and .459" into each cylinder hole will reveal the throat dimention.

Jacketed bullets have been reported to shoot more accuately.

A damaged,out of alignment or out of spec forcing cone will also cause bad accuracy as well as barrel leading.

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NEVER GIVE UP YOUR GUN

If they shoot well, to your satisfaction, with ammo that you are confident in, do you even have a problem? Nice guns, BTW, but a little difficult to find a pocket holster for!

Kaaskop49
Shield #5103