I am currently waiting for Hart to re-barrel my Rem40X in 30BR. Or should I say 30 Remington AR? What does AR mean?
I have now looked at 3 different sources for drawings of the 30BR case and chamber. All 3 are different, only slightly , but different. Do the custom barrel makers follow the SAMMI standards?
Attached Files
Only if you contract with them to follow SAAMI spec's.
Attached Files
Personally I would have the version with the “no turn” neck dimensions. Turning case necks is a total pain.
Attached Files
Are you having it chambered in 30 BR or 30 Remington AR? If it's the AR I'd call and go with the standard BR. Brass for the AR is hard to find, if you can even find it, from what I've read and forming it is gonna be a hassle. I get the feeling from what I've read the AR was designed for auto rifle use which might explain the AR part. Once again from what I've read the rim of the AR is .492 while the rim of the BR is .473. It might fit a standard bolt recess but I wouldn't take the chance on it.
Attached Files
Three thoughts:
Farm boy from Illinois, living in the magical Pacific Northwest
Attached Files
I’m surprised that Dave Kiff at Pacific Tool & Gauge, Inc hasn’t been suggested. He’ll work with you to have a reamer with the neck thickness you’ll use. And he’s a good source of information.
As for neck turning, all the $ put into a project almost encourages you to buy a couple hundred pieces of brass, then debur the flash hole, uniform pockets and turn the necks. You only have to do it once and you know the bullets are centered in the bore and you’re guaranteed a consistent neck clearance. But you know that already.
I write all this off as due diligence. Is it absolutely needed? Nope. But if you’re chasing accuracy you won’t feel right without doing it. Sell the reamer after you’re done if you want to recoup the $. I looked around and wasn’t able to find Lapua 7mm BR brass. I’m a bit envious. It sounds like you’ll end up with the high probably of an accurate rifle. Bill.
Attached Files
Ross, will you ream it out for a conical/spitzer or will you leave it close for a bore rider? And I’m not knowledgeable enough to comment on this, but who do people go to when chambering a competition cast rifle. I’d assume they would have the reamer you’d need. It would make sense that they would need a sample bullet. Is it possible that before being necked up, that the neck length is .881? Wow, that’s very forgiving if it’s true. Bill C
Attached Files
Hart is re-barreling my 40x Rem. I chose them because they will do the whole "package". I told them I wanted to shoot 150 grain Match Kings and some .310 bore ride cast bullets.I'm done with John Ardito's over sized tapered throats. I left the throating up to Hart because they know more about this than I do. I already have 100 Lapua brass. small rifle primer, primers, and LEWilson dies. and a neck reamer. After making cases for the Ardito rifle out of 30-05 brass, I think I have some experience for making 30br out of 6mmbr.
All said and done, it appears that Remington had two chances to standardize a cartridge as a 30br or 30ar but didn't succeed. There have been many wildcats nearly the same.so it must be a good design.
I know some of you have worked in the "industry", maybe you have some insight.
Attached Files
Who to go to do the chambering? I’ve had bad and good experiences there.
The best one was done by an experienced competitive CB shooter. He knew the importance of bullet fit. Not all smiths have that knowledge or the skills to implement it.
Tom
Attached Files
Thanks to Karen at Hart Barrels, she told me to go to PTG. They have a schematic of a 30 BR Robinette. I assume that is as close to a standard as there is.
Attached Files
the Robinette is a .330 neck. that is what i use in my 30Br. i turn to .009 neck sidewall
Attached Files
Mine is the Robinette chambering. I turn necks to .010” thickness.
Attached Files
speaking of Robinette ...
IF you really want to get into the nitty gritty of current obsessive MJ bench shooting ...
call Bib's Bullets and buy a couple boxes that Randy will recommend for your chamber and barrel and goals ... his bullets are as good as it gets .....
and a side ... maybe the Main ... benefit is getting a complete detailed coverage on the state of the art of that sport ... be sure to record everything, if you mostly listen, you will have enough correct information to sort over for several months ...
and some terrific bullets ...
ken
Attached Files
I shot a Robinette 30BR in jacketed benchrest, and it is awesome. Yes it is a .330 neck, and with a .3083 bullet the .010" neck thickness works fine. Some cast guys wanted to start shooting the 30BR, but with .310 bullets, the usual .010 neck thickness won't work. They were buying prep'd brass for the 30BR with .010" necks. So I had a .332" neck reamer made, and once the chamber was done I opened the neck to .332".That solved that problem. But the chamber has a .3084" leade, so the bullet is immediately getting swaged down right out of the brass, plus the leade has only .010" freebore. Not many cast bullets will work with that short leade without seating it way down in the case body. So I had a 1 degree, .311" throating reamer made. So a shooter could seat their bullet of choice it the case with the bullet base still in the neck as it should be, and the throat was cut to fit. It makes life real easy for the cast shooter and shoots very well.
Attached Files
Pacific tool and die sells a all in one chamber reamer: 30BR REM CAST (.333 Neck) 1 degree included taper, .3105 diameter freebore, .0527 freebore length. He will also make you anything you want. You say you want to shoot bore ride cast...you will benefit by bumping bore riders more round.
Attached Files
RicinYakima
45
linoww
42
pat i
27
Premod70
24
OU812
23
Tom Acheson
23
Bud Hyett
22
Pentz
21
oscarflytyer
19
Shuz
19
