I sold my Winchester M71 about seven years ago, but here are the best two loads I developed, shot with a vintage Lyman #56 peepsight:
W-W brass, CCI-200 LR primer, Hornady 200 grain JKT/FP, 65.0 grains of Re19. 2365 avg fps @ 83f, F-1 Chrony @ 18' from muzzle. Data source - Handloader #214. Average group @ 100 yards, 2-3/4".
W-W brass, CCI-200 LR primer, Hornady 200 grain JKT/FP, 60.5 grains IMR 4350. 2402 avg fps @ 60f, Beta Chrony @ 10' from muzzle. Didn't record my data source. Average group @ 100 yards, 2 1/8".
I also chronographed some 200 grain Winchester Super-X factory ammo, with the Chrony set at 18' and a 83f temperature. The load averaged 2443 fps. Average group @ 100 yards, 6".
I ordered some Beartooth Bullets in 245 grain GC, sized .349", but never developed a load for them. I do remember a warning not to use them in the Browning rifles due to a difference in the lead/throat and the potential for developing excess pressure. My rifle was a 1957 vintage (late) standard M71.
Ps There is an article with some data for the Browning M71 on page 69 in the Legacy of Leverguns magazine published by Wolfe in JAN 2000.
Last edited by Odessa; 09/03/10.
