Roll vs Taper
Moderators: Bullseye, Moderators
Roll vs Taper
I have been struggling getting my 38sp loads to where I want them. All along, I have been using a "taper crimp" on them. The results, regardless of the powder level, were inconsistent burn and power. Using 5.8-6.3 gr of Win AutoComp, with a plated 125gr bullet, nothing seemed to comfortable. That is, until I used a "roll crimp". The reason I didn't use a roll crimp before is that my Lyman dies came with a "taper crimp" die. I didn't realize, until Mr Greener mentioned it, that the bullet seating die also doubles as a roll crimp die. Now that I have been roll crimping my 38's, they are shooting more consistent with good power and burn rates. Now I have "backed off" on the amount of powder necessary. All in all, a much nicer round to shoot.
Haka
Haka
- blue68f100
- Master contributor
- Posts: 1997
- Joined: Mon May 25, 2009 10:31 pm
- Location: Piney Woods of East Texas
I do beileve that the "factory crimp die" that lee sells will put a taper crimp on a 38 spl, so they are out there. but most revolver rounds use a roll crimp, I think that it gives resistance to the bullet leaving the case and increases the pressure so you get a more complete ignition of the powder.
or in lever actions it keeps the boolit from being jammed into the case in the magazine.perazzi wrote:As bgreenea3 says, My understanding has always been, roll crimp for revolvers, and taper crimp for semi-autos which headspace on the case mouth.
the roll crimp prevents the bullet from moving towards the muzzle under recoil and locking up the cylinder.
Here's the set I have:
http://www.lymanproducts.com/lyman/dies ... e=6&die=20
I pretty much won't be using the taper crimp any more. Live and learn.
Haka
http://www.lymanproducts.com/lyman/dies ... e=6&die=20
I pretty much won't be using the taper crimp any more. Live and learn.
Haka
I like these.....http://www.leeprecision.com/cgi/catalog ... crimp.html
I lnow i'm going to get some flak from folks who love RCBS, Lyman, Or Dillion. but I've used all of them and Lee's dies are as good as the others at a cheaper price and I like some of their features.
I lnow i'm going to get some flak from folks who love RCBS, Lyman, Or Dillion. but I've used all of them and Lee's dies are as good as the others at a cheaper price and I like some of their features.
I've been satisfied with my Lee dies. They are the only ones I've had and, maybe, I just don't know no better.
I haven't seen much in my reloads to indicate that I should be doing the taper crimp except for .45 ACP. I have Lee Factory crimp dies but only use the .45ACP die. I had trouble getting consistent chambering in my Taurus and P90 until I used that die. 9mm reloads seem to have no problems with the roll crimp. I have a Lee Pro 1000 which only takes 3 dies, so the factory crimp is a separate operation and I'm too lazy to perform an operation I don't need.
I haven't seen much in my reloads to indicate that I should be doing the taper crimp except for .45 ACP. I have Lee Factory crimp dies but only use the .45ACP die. I had trouble getting consistent chambering in my Taurus and P90 until I used that die. 9mm reloads seem to have no problems with the roll crimp. I have a Lee Pro 1000 which only takes 3 dies, so the factory crimp is a separate operation and I'm too lazy to perform an operation I don't need.
I've used Lee dies for years. I've got no complaints about them, they do the job well.
R,
Bullseye
I see you two, and many others like the Lee dies. Include me in that group.Garrulous Maximus
I've been satisfied with my Lee dies.
9mm reloads seem to have no problems with the roll crimp.
I was hesitant on purchasing Lee dies when I was wondering which manf to
buy for my 223 reloading needs. I have dies from Lyman, and RCBS, both of which
are nice die sets, but I thought I would give Lee a try. I have loaded about 2000 223's
so far without any problems, the dies are a great bargain and do the job as well as my other dies.
I also purchase Lee's for my 9mm and love em, I wouldn't hesitate to recommend them to any body.
Greener, you say you roll crimp 9mm's ? Don't they head space off the mouth? No problems?
thanks, Haka
- blue68f100
- Master contributor
- Posts: 1997
- Joined: Mon May 25, 2009 10:31 pm
- Location: Piney Woods of East Texas
If you have not tried any Hornady Dies you way want to give them a try. I own a mix of dies but I seam to like the hornady's the best. The sizing is much smoother over RCBS and Lee. And they still have the rebate going on too.
Magnum calibers require a heavy roll crimp. Slow burning powders some times need it too to help build up the pressures for a even burn. I normally let the bullet design dictate which to use.
Magnum calibers require a heavy roll crimp. Slow burning powders some times need it too to help build up the pressures for a even burn. I normally let the bullet design dictate which to use.
David
SS MKIII 6 7/8" Fluted Hunter. Mueller Quick Shot, Bushnell 2x Scope, Hogue Rubber Grips
Custom Built 1911
SS MKIII 6 7/8" Fluted Hunter. Mueller Quick Shot, Bushnell 2x Scope, Hogue Rubber Grips
Custom Built 1911
Finally remembered the filler bit for more complete powder burns.
The recommendation is a bit of polyester fiber in the case to cause more even and complete burn rate. Over on rugerforum.net
http://rugerforum.net/reloading/10444-c ... wegan.html
http://rugerforum.net/reloading/18442-q ... iller.html
I've intended to try it, but haven't found that round tuit yet.
The recommendation is a bit of polyester fiber in the case to cause more even and complete burn rate. Over on rugerforum.net
http://rugerforum.net/reloading/10444-c ... wegan.html
http://rugerforum.net/reloading/18442-q ... iller.html
I've intended to try it, but haven't found that round tuit yet.