Post by: Sabotloader on August 15, 2014, 01:48:52 PM
What I have been trying to do is to shoot a full bore conical other than a pure lead concial. With the advent of the 50 caliber pistols, there are some really nice 50 cal. bullets on the market. Of course these are not designed for a ML so some work on the bullets is needed. What I have been trying to do is to create a knurling on the bullet that increases the diameter of the bullet from .500 to .5015-.502.
As it turns out the Barnes and Speer bullets are very easy to knurl and create the lift needed. On the other hand the brass Lehigh bullets are more difficult - they are harder. Yet they are no harder on the barrel bore than a copper bullet as both copper and brass are self lubricating metals.
Anyway this week I changed up my knurling method in an effort to get more lift on the brass bullets. With the copper Barnes and Speer's a simple use of two mil files creates plenty of lift. The mil files will not create enough lift on the brass bullets. I have been using two general purpose files to get this done. But, this week I added a thick piece of leather under the bottom file to give a form of cushion as I roll the bullet across the surface of the files.
This shows my basic older operation...
(https://hunting-washington.com/smf/proxy.php?request=http%3A%2F%2Fimg.photobucket.com%2Falbums%2Fv130%2Fsabotloader%2FXPBKnurlingComposite.jpg&hash=7aa034183bb885223f9304b91a9de8f65cefd19e) (http://smg.photobucket.com/user/sabotloader/media/XPBKnurlingComposite.jpg.html)
With the addition of the leather as a partial cushion under the bottom file I was able to easily get the lift that I needed for consistent knurling.
Testing this morning confirmed my progress... The two bullets that I used this morning were both built by Lehigh Defense. The first one I used was a Bloodline 50x325 grain bullet packaged with a purple 50x54 sabots for shooting from a 54 caliber rifle. The second bullet was a Lehigh 50x350 grain bullet built for the #500-200 (350 grain) was designed to provide advanced terminal performance for the new .500 cartridges including the .500 Cyrus, .500 S&W(Encore rifle), and .50 Beowulf.
(https://hunting-washington.com/smf/proxy.php?request=http%3A%2F%2Fwww.lehighbullets.com%2Fprodimages%2F500-200T.jpg&hash=aa48a3e310f1dd5404d9c6ea4f241ce51f95fd48)
This composite shows some of the shooting accomplished this morning...
(https://hunting-washington.com/smf/proxy.php?request=http%3A%2F%2Fimg.photobucket.com%2Falbums%2Fv130%2Fsabotloader%2FShootComposite-11.jpg&hash=0f37e62ba7564a2de71df30e9c0c099ffff0b47e) (http://smg.photobucket.com/user/sabotloader/media/ShootComposite-11.jpg.html)
Post by: oneshot12 on August 15, 2014, 04:22:26 PM