How far off the lands?
04-23-2011 | 12:06 PM
#11
Nontypical Buck
Joined: Aug 2005
Posts: 2,600
Likes: 0
From: S.W. Pa.-- Heart in North Central Pa. mountains-
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04-28-2011 | 05:40 PM
#12
Fork Horn
Joined: Feb 2003
Posts: 494
Likes: 0
From: Altadena CA
I shoot various slugs. Not that it matters much because the mag well limits the OAL. These rifles have a lot of shots through them, so I could be looking at throat erosion. However, they still both shoot sub-MOA.
04-28-2011 | 08:26 PM
#13
Fork Horn
Joined: Dec 2009
Posts: 479
Likes: 0
From: central Wisconsin
Well when I reloaded I did a huge personal study on this with my .270 win M70. I bought a RCBS case mic and found the exact distance to touch the lands and set my dies up to this. Then I set five back .005", another five back .010" etc etc until I reached the normal factory length. I don't remember what that is now offhand.
What my testing showed me was that there (for my rifle and loads) was no advantage to getting the bullet close to the lands. The normal length grouped just as well without possible feeding problems etc. I also had more pressure signs when close to the lands (flattening primers etc).
What my testing showed me was that there (for my rifle and loads) was no advantage to getting the bullet close to the lands. The normal length grouped just as well without possible feeding problems etc. I also had more pressure signs when close to the lands (flattening primers etc).
