The Frontier Sixshooter Community Message Board - 742 Jam-a-matic.....

742 Jam-a-matic..... (reply)

Bud — Tue, 23 Apr 2013 16:47:39 +0000

Even on the 760 I have to use the small base '06 dies. Had a nice Grade II BAR '06 for awhile, nary a jam with that thing....and it was deadnuts accurate too.

742 Jam-a-matic..... (reply)

Sarge — Tue, 23 Apr 2013 05:29:27 +0000

I fought the 740 and 742 at different times... the bugs were pretty well worked out in the 7400. We had one around here for years and it ate hat-fulls of my 'o6 reloads with nary a complaint.

742 Jam-a-matic..... (reply)

Bud — Mon, 22 Apr 2013 15:53:18 +0000

That's a good one. Have ole 760 in '06...never seen the need for a 742.

According to Larry Potterfield, CEO & Founder of MidwayUSA (reply)

FOG — Mon, 22 Apr 2013 15:30:25 +0000

With the possible exception of the RCBS Chamfering Tool, that is the correct way to do the job using hand tools:

Gunsmithing - How to Shorten and Recrown a Rifle Barrel with Hand Tools (YouTube Video)

If you wonder how I know about this video, let's just say I still have mine.

My RCBS Chamfering Tool, that is.

Kinda makes you wonder....... (reply)

Jimmy P. — Mon, 22 Apr 2013 15:20:19 +0000

"But if I ever see a guy shorten a barrel with a hacksaw, knock off the sharp edges with a file and crown it with an RCBS case mouth chamfering tool,.."

Guilty. I really didn't think anyone saw me do it.

I did it one time though, exactly as described right down to the RCBS chamfering tool. I did file the end as square as eyeball measurement would allow. It was an old, much neglected, 742 Jam-a-matic so there was nothing to lose. It accounted for several deer before giving up the ghost.

According to the author... (reply)

FOG — Mon, 22 Apr 2013 14:54:48 +0000

"Maybe there are other factors that I should have considered."

Yeah, such as, What the ____ ?!?

Kinda makes you wonder.......

Byron — Mon, 22 Apr 2013 14:45:54 +0000

http://www.longrangehunting.com/articles/rifle-crown-1.php

Byron