Hunt Chat  

Go Back   Hunt Chat > Tools of the Trade > Reloading Bench

Reply
 
Thread Tools Display Modes
  #1  
Old 06-05-2016, 02:12 PM
DocHunter's Avatar
DocHunter DocHunter is offline
Registered User
 
Join Date: Dec 1969
Location: Kentucky
Posts: 44
Remington Rolling Block 7x57

I recently acquired a 1901 Remington Rolling Block 7 mm. This is supposed to be the 7x57, BUT maybe not exactly. This model was built for several nations armies, and this rifle has a bayonet lug. I have read that this model MAY have excessive headspace and require modified brass for loading safely and shooting. Other sources say they fire standard sized 7x57 ammo. I took the gun to a local gunsmith who superficially looked it over, said it looked very good and safe to fire, but did not specifically measure headspace even though that was my specific question. I do know that this gun should be loaded with cast bullets and at much lower pressure (velocity) than modern 7x57 weapons. I have read about methods of neck sizing with a .30 caliber die, then partially neck sizing only with the 7x57 die to create a false shoulder, loading the ammo and firing to produce fire-formed brass to then be loaded for this gun. This process is described as being hard on case necks, requiring frequent annealing of the necks. One source also indicated that this neck sizing requires a neck sizing die while others imply that it can be done with a regular die so long as you do not size the entire case. This whole process seems like more than I may want to tackle, but I hate to give up without trying. I already have 7x57 reloading dies and brass as I have loaded (much hotter) ammo for a Ruger #1 in this caliber for years. I may not ever shoot this gun a lot, but would really like to shoot enough to determine point of aim and to kill a deer with it. The rear sight is a ramp for elevation which also can be raised for greater distances. There are numbers on the left side of the ramp from 1 through 5, and on the elevated portion from 6 through 19. I wondered if this represented ranges from 100 to 1900 yards? Any reliable help with info about safely shooting this gun would be appreciated.
__________________
NRA Benefactor Life Member
NWTF Member
LKS Life Member
RMEF Member
http://dochunterthoughts.blogspot.com/
Reply With Quote
  #2  
Old 06-28-2016, 11:40 AM
Rapier's Avatar
Rapier Rapier is offline
Registered User
 
Join Date: Jun 2005
Location: Florida
Posts: 1,323
Doc,
There are at least two ways to fireform cases with an over length chamber. One is as you describe, with a false shoulder. However the easiest way for you with the RRB would be to seat the bullet out and use the bullet, pushed into the lands to hold the base of the case against the firing pin. Once the case fires, it will be the size of the chamber, then you just neck size from then on. With a single shot, use the extractor cut to set the cartridge head stamp to, say the first 7 so the case is always aligned.

With cast bullets it is a snap to do with moderate loads.
Ed
__________________
The three Rs: Respect for self; Respect for others; and responsibility for all your actions.

"Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take, but as for me, give me liberty, or give me death!"
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:12 AM.


Powered by vBulletin® Version
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd.