[ed dixon]

What be that?

[Chugach]

:confused:

Wow, you got me, Ed! How was the term used?

[HSMITH]

Rolled between plates. It will take the "glock bulge/belly" out of the cases and ensure they are sized well enough to load progressively or automatically. All "roll sized" means is that the gross errors in case size have been ironed out and you can use them. Glocks and machine guns are great reasons to buy roll sized brass, both usually swell the brass pretty significantly. There is one real advantage to roll sizing that the home loader does not have, and that is 100% of the length of the case is sized, You and I with out sizing dies cannot typicall reach the bottom .200" or so of the case.

[Jeeper]

Roll sizing is making the case back to the original dimentions. It is done by a machine and not a die. This allows tha entire case to be sized. WHen you size with a die the bottom part doesnt get sized since the die meets the shellholder before it can. It is usually used by brass sellers so that they cann sell brass shot through any gun and make it reloadable. Since some guns(Glocks mainly) have uinsupported chambers then their brass if not rollsized would be unshootable in other guns.


EDIT

I guess me and HSMITH were posting at the same time

[ed dixon]

Chugach, I think we have our answer. This came up for me on the recent thread about once-fired .45 ACP. Seems some advertise this as a selling point. Thanks for the info Mr. Smith and Mr. Jeeper. Ed

[Chugach]

Ed, who woulda thunk it? True full-length resizing. That's what I love about this place...literally learn something every day.

Thanks HRSMITH and Jeeper!

[caz223]

The only problem with roll-sizing is that it really cuts down on the life of the brass.
Also, you might not want to shoot it in your glock.
A good worst case scenario is shooting commercially reloaded, roll-sized lead 200 grain .40 cartridges in your glock.

[stans]

Brass can work harden pretty quickly, so rolling out a big bulge at the case head is going to make that portion of the case harder and more prone to splitting rather than stretching. Unsupported chambers and work hardened brass can be a real bad combination.

[Dave R]

So...can you "full-length anneal'? I don't see why not. For short cases, it would be hard to anneal the neck and not the rest of the brass. Except the headstamp, of course.

[Steve Smith]

Caz is right, several roll-sizing companies' brass has shown a propensity for early seperation.

[Sam]

Personally I wouldn't want to be using cases that had to be "roll sized".
If it had been fired to the point where the head was distorted, I'd pitch it.
Hog fat subgun cases and unsupported Glock cases are low on my list of desirable brass.

You might get away with it for a while but there was a reason why it had to be "roll sized" in the first place wasn't there?

Sam

[Grump]

Full-length anneal is a recipe for disaster in rifle calibers. The case head is intentionally work-hardened to hold the pressure. Take a sectioned case, look at the .05 or less brass thickness between the powder chamber and the front bevel of an extractor groove, and you'll see why.

Your loads in a Glock, or in a non-ramped .45 ACP Government Model, will typically not bulge, crease, show a "smiley" or otherwise bulge beyond what a normal resizing die will resize until you're way above standard pressures. Unfortunately, a very few individual rounds of even factory ammo have blown out cases in LE officers' Glock .40s, at least according to credible reports I've read about.

I got the "smiley" thing on some Winchester .40 S&W cases and they resized just fine. Dumped 'em after one more firing though.

One advantage of roll-sizing is the cases were not slipped in and out of a die, with the resulting micro-scratches that come even with carbide or TiN dies. Case mouth splits are usually traceable to that problem.

IMO, roll-sized cases are just fine as long as you inspect them for old feedramp creases. Roll sizing is just an easier manufacturing process compared to conventional resizing.

[Hoser]

Every round that I put through a pistol gets roll sized before I reload it. I shoot 38 TJ/Super, 40 and 45ACP at IPSC Major power factor, 9x19, 38 special, 38 TJ/Super, and 45 Colt at minor. 454 Casull at hunting power.

Over the past four years since I bought my roll sizer I have shot close to 150K rounds. All of it roll sized.

Doing an experiment with Schuemann AET pistol barrels to see how the chamber fluting would damage and possibly shorten case life, I loaded the same 10 peices of Remington 38 super over 15 times. Loaded a 115 JHP at the speed of heat. Roll sized between every reload. No problems.

I loose most brass before the 5th reload anyway.

I will continue to roll size every pistol round I shoot.

I roll size a lot of brass for IPSC and IDPA shooters in Colorado. No complaints there either.

http://www.casepro.net/