I recently bought a 5.5" Bisley in .45 Colt. I own a reamer and pilots, so I checked the throats and 5 would barely pass a .4510 pilot with the 6th passing it more easily. I figured I'd shoot it before doing anything to it. Turns out it shoots like a laser compared to my 7.5" .45 Bisley, and has no leading with max H110 255gr cast SWCs. Can't say the same for my 7.5".
All was right with the world until I started playing with some longer 300gr bullets and found that they will not chamber entirely. Odd because I have some 355s that did. Anyway, I would like to be able to shoot most commonly available cast bullets, but I don't want to mess with this exceptional accuracy and lack of leading. My reamed 7.5" leads towards the muzzle and is not as accurate.
To the point, is there any chance reaming to .4525" from .4510" could make the gun less accurate or cause leading? I know usually the reverse is true, but don't wanna ruin a good thing on a hunch.
All was right with the world until I started playing with some longer 300gr bullets and found that they will not chamber entirely. Odd because I have some 355s that did. Anyway, I would like to be able to shoot most commonly available cast bullets, but I don't want to mess with this exceptional accuracy and lack of leading. My reamed 7.5" leads towards the muzzle and is not as accurate.
To the point, is there any chance reaming to .4525" from .4510" could make the gun less accurate or cause leading? I know usually the reverse is true, but don't wanna ruin a good thing on a hunch.