- Posts 157
Last Activity:09-11-2016 2:01 PM
26 Likes on 19 Posts
Posted in thread: Questions on Rifling on 08-16-2016 at 11:43 PM
Dallas and Greydog,Bearing surface length, or lack thereof (obviously some bearing surface is
required for the engraving process), and bullet length alone do not determine gyroscopic
Posted in thread: Questions on Rifling on 08-10-2016 at 05:58 AM
Not the length of the bearing surface; the length of the bullet in total. A round nosed bullet
with lots of bearing surface will require less twist than will a long, pointed bullet of the
same weight ...
Posted in thread: Questions on Rifling on 08-09-2016 at 08:24 PM
Polygon rifling refers to the form rather than to the manufacturing method. Generally speaking,
any form may be produced by any method. In addition, there are variations in form which may be
Posted in thread: Loose Scope Mounts Got Me on 05-10-2016 at 06:07 AM
I shot an entire silohuette match with a loose scope ring. I would make a few good shots then
make an uncalled miss which really had me doubting my abilities. I had one shot go into the
dirt, ahead of...
Posted in thread: A 1917............ on 04-14-2016 at 06:48 AM
I believe it was a 1917 Enfield which was used by Sgt. Alvin York when he won the Medal of
Posted in thread: Loose rifle chambers on 04-14-2016 at 02:58 AM
On the 30/40 brass I used fifty two years ago, the rim was large enough that it had to have
about.005 removed to allow it to seat in the chamber of my #4. This was after it had been sized
Posted in thread: Loose rifle chambers on 04-13-2016 at 05:43 PM
Leaving all else aside, The reference to varying cartridge dimensions is another valid concern.
While I have found rim thckness dimensions to be remarkably consistent from brand to brand,
Posted in thread: Loose rifle chambers on 04-11-2016 at 05:41 AM
While I do not have the test equipment used by the manufacturers, I am capable of running
useful experiments and producing valid results. I don't glean all my knowledge from manuals and
Posted in thread: Loose rifle chambers on 04-07-2016 at 08:10 AM
Everything I say and do is based not on what was written in 1920 or on computer simulations but
on what I have tested and experienced myself over 40 years of gunsmithing and rifle building
and fifty p...
Posted in thread: Loose rifle chambers on 04-07-2016 at 12:49 AM
There are a lot of points to address here. Once that limit has been surpassed, the case no
longer provides any resistance to the pressure. In addition, if the action is a rigid front
locker, the amoun...