BullitHolz
Member
- Joined
- Apr 30, 2008
- Messages
- 85
Hey guys, I have a GP100 that I picked up new about 8 months ago. I've put quite a few rounds through it, all jacketed, and it shoots 3" groups at 10 yards. I think most of that group size is me so I'm not to concerned about that. what does concern me is that, in the interest of saving cash I started loading lead to shoot in this gun and that is when the trouble started.
Simply stated this gun will lead the heck out of the barrel, badly enough that midrange loads(800 FPS or so) will keyhole targets with the first round. This whole thing got me really curious so I did a LOT of reading on the subject. Well pretty much everyone in the know suspects that these Rugers have cylinder throats that are too tight and often need to be reamed to .3585 to shoot lead with minimal effects. So I decided to check the throats on my gun and find out that my problem is the exact opposite, the throats are oversize. I slugged the throats and then mic'ed(not calipers) the slugs and noted that 4 of the throats are .3595 and 2 are .3605. Needless to say bullets drop right through them.
I debating about sending this gun back to Ruger but I might just keep it and only shoot jacketed rounds in it.
Has anyone else seen this and is this common with these guns?
Simply stated this gun will lead the heck out of the barrel, badly enough that midrange loads(800 FPS or so) will keyhole targets with the first round. This whole thing got me really curious so I did a LOT of reading on the subject. Well pretty much everyone in the know suspects that these Rugers have cylinder throats that are too tight and often need to be reamed to .3585 to shoot lead with minimal effects. So I decided to check the throats on my gun and find out that my problem is the exact opposite, the throats are oversize. I slugged the throats and then mic'ed(not calipers) the slugs and noted that 4 of the throats are .3595 and 2 are .3605. Needless to say bullets drop right through them.
I debating about sending this gun back to Ruger but I might just keep it and only shoot jacketed rounds in it.
Has anyone else seen this and is this common with these guns?