Gun and Game Forums - View Single Post - 10-fp chamber dimensions

samuel · 01-27-2008, 08:42 AM

I found one load book that gives oal of 2.780" for 180gr bullets.It,s the Lyman 47,th edition.Going by that oal the casing trimmed to 2.015",bullet length-1.280",neck length .343",the bullet would be seated .172" below the neck.I went back in your posts and you stated 40gr,H4895.With new cases that would leave the powder below the neck,I believe.I see no reason to worry about a compressed charge as it would be slight if any.The problem with compressed loads is if they are compressed too much they may push the bullet up a little and if you are running close to the riflings they may put the bullet into them.When using compressed loads you should meisure oal that day and meisure it the next day to see if the charge has pushed the bullet.Charges shouldnt be compressed more than about .010 percent. sam.

01-27-2008, 08:42 AM	#2
samuel Senior Member Join Date: Dec 2006 Posts: 4,630	I found one load book that gives oal of 2.780" for 180gr bullets.It,s the Lyman 47,th edition.Going by that oal the casing trimmed to 2.015",bullet length-1.280",neck length .343",the bullet would be seated .172" below the neck.I went back in your posts and you stated 40gr,H4895.With new cases that would leave the powder below the neck,I believe.I see no reason to worry about a compressed charge as it would be slight if any.The problem with compressed loads is if they are compressed too much they may push the bullet up a little and if you are running close to the riflings they may put the bullet into them.When using compressed loads you should meisure oal that day and meisure it the next day to see if the charge has pushed the bullet.Charges shouldnt be compressed more than about .010 percent. sam.