OAL Determination???


PDA






Eric F
March 11, 2008, 04:24 PM
Ok so I just got my 50-90 sharps. How do I determin the maximum OAL for a given bullet? I understand this requires a chamber cast how do I do this? where do I get the supplies from?

If you enjoyed reading about "OAL Determination???" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!
moosehunt
March 11, 2008, 05:37 PM
The OAL thing is taken way too seriously. All that matters is a) if they will fit in the magazine (of a mabazine gun) and b) if they will fit in the chamber. I'm guessing your big thumper might likely be a single shot; if so forget about the first one. As to fitting your chamber (I'm guessing you don't have a Stoney Point gauge), start with the bullet seated way out. Slip it in the chamber. It probably won't go because the bullet hits the rifling. Now, take and incrementally seat the bullet about .025 or so deeper and try again, doing this till the cartridge goes in the chamber. This is without significant force, but don't be afraid to assist it a little. Once it fits, it is probably best to seat it about another .020, then go shooting! You're home. If it is a magazine gun, then when you get to this point, see if they'll fit the magazine. If they do, you're in. If not, you have to shorten them some more until they do--or shoot it single shot. The max OAL for your gun, with any specific bullet, is one of the above two, not necessarily what any book says. Max OAL in your gun might be longer or shorter than someone elses. That is immaterial, unless you want to shoot the shells in both guns, then, obviously, you'ld have to go with the shortest one, which, incidently, won't hurt in the longer gun at all.

Oh, by the way, you're probably going to be crimping these loads, but obviously, don't set your die to crimp until you find the length you need.

rcmodel
March 11, 2008, 05:38 PM
Cerrosafe from Brownell's or Midway USA.
http://www.brownells.com/aspx/NS/store/productdetail.aspx?p=384&st=cerrosafe&s=

But you can save yourself the trouble if you smoke a few bullets with a candle and seat until it just touches the rifling.

rcmodel

30Cal
March 11, 2008, 05:57 PM
If you stuff a loaded cartridge into the chamber and it doesn't fall out from gravity alone, then the bullet is into the lands and needs to be seated deeper.

If you enjoyed reading about "OAL Determination???" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!