Hello Gentlemen,

I have a M71 military single shot rifle in my possession and I am looking for a safe nitro-powder load for target practise, upto now to no with result.
The original load of the M71 (caliber designation 11,15x60R, not to confuse with the 11,15x60R Schueler!)was a lead bullet (paper patched) of about 380grains for about 400 m/s / 1400fps.

Here are two loading reciopes from the internet (for information only)

"The loading information I use for the 11 mm is as follows: What I am giving you here are the loads I have found work best to this point. Please understand with no baseline I kissed many toads before comming up with a princess. All loads use a wax paper cover wad between the cushion wad and bullet base.
Black Powder, goex FFg
Case Length: 2.320
Powder: 72 gr
Wads 1 .060 or 2 .030 fiber
Bullet Lyman 436 gr seated .500 (measured from case top to bullet top. .120 compresson)
RCBS 396 gr seated .550
Lube: 50/50 melted mix of Thompson pruple stuff and Thompson patch lube.

Pyrodex loads, use pyrodex RS
Case lentgth: 2.320
Powder: 50 grains
Wads: 1 .060 or 2 .030 fiber
Primer: CCI LR
Bullet seat: LYMAN 346 GR seated .500 (measured case top to bullet top.)
RCBS 396 GR seated .550
Lube: 50/50 melted mix of Thompson purple stuff and Thompson patch lube.

I hope this base line may help others starting from scratch. The trajectory pretty well matches the sights (at least with my gun). The muzzle velocity is right around 1400 feet per second plus or minus 20 fps per second and fouling is medium. I am still trying to figure out how you site at 300 meters.
Terry

I have more information on request, especially for assembly/disassembly of the rifle.
best regards
Rolf