R P 38 cases

I have about 500 R P match cases from 38 wc match ammo and some other 38 R P cases. The match ones have 2 lines around them like a crimp groove. The other have no lines. Are they the same R P cases or does the 2 lines designate match cases ?

The two lines are case cannelures placed and deep enough to get the bullet release for accuracy. I am convinced that was the key difference in accuracy between factory ammo and reloads.

Using the Remington 148 wc's what is your procedure for reloading them ?  Do you resize the cases or not and what or how much crimp do you use ? How deep do you seat them ?

I resize because I have brass fired in multiple guns, from a Colt MR, 52, and several revolvers. I expand so I can stick the bullets in at least halfway and seat. I use RCBS dies and do NOT use a Dillon expander. Up until recently, my 38 WC ammo was loaded single stage. Now I use a Hornady LNL AP.

Thank you for the information, I appreciate it. I reload for only one 357 mag gun a S&W model 19, so should I resize the cases or not ?

rebs wrote:Thank you for the information, I appreciate it. I reload for only one 357 mag gun a S&W model 19, so should I resize the cases or not ?

Depends upon the size of your chambers and the size of your bullets.   Chances are, with the size of your Remington WC's, you may be able to reload them without resizing the brass.   Suggest you taper crimp after seating the bullets.

Don

Somewhere I saw a thread about optimum brass length for 38 spc WC.  I think the info originated from Mr Jerry Keefer (RIP).  Now I can't find it.  Trying to get my 52-2 dialed in.
Any direction?
Alex

I only use R.P. .38 cases as they tend to have the thinnest walls and work best with the Rem 148gn WC.
With a M52, I shoot unsized cases.
Ignore the cannelures as they are no longer of any effect with a fired case.
I also found that case length had no effect on accuracy, but roll crimping with a Redding Profile Crimp die shrank my group size.

noylj wrote:I only use R.P. .38 cases as they tend to have the thinnest walls and work best with the Rem 148gn WC.
With a M52, I shoot unsized cases.
Ignore the cannelures as they are no longer of any effect with a fired case.
I also found that case length had no effect on accuracy, but roll crimping with a Redding Profile Crimp die shrank my group size.

If that is the case then it doesn't matter if they have the double cannelure or not, right ? Then I can just bunch they all up together since they are all once fired, right ?