roysclockgun
Handloader
- Dec 17, 2005
- 736
- 1
Awhile back, in a swap, I got a Browning Stainless Stalker w/BOSS, in .280Rem. The rifle is topped with a Zeiss Conquest 3-9x40. I have not used the BOSS with brake, that came along with the rifle, but only the BOSS wo/brake, as even loaded hot, the recoil is not at all severe. I began to load up handloads, for hunting and test fired a number of loads, playing with the BOSS settings. I settled on 53gr. of IMR4350, pushing a Nosler AB 140gr. I used standard Large Rifle, Winchester primers. My OAL was 3.3880" to 3.3895". Brand of cases seemed to make no difference. Maybe I am foolish to think this, but I never used reloaded cases for the hunt, even though they perform as well as do new cases. For the hunt, I used new R-P cases. The BOSS setting was 4.1. Off the bench, at 100 yards, three rounds punched one little hole. I measure from outside edge to outside edge. At the widest point the hole measured .303 inches, or 7.69mm! For me, that is a phenominal group!
I wonder why the BOSS has not caught on with other firearms manufacturers, to be more widely used? I have never liked the "lump" on the muzzle end of any firearm, but for tuning in groups like that, I can accept the lump. The muzzle brake gives no advantage worth accepting the blast that it creates, so of the two BOSS attachments, I will only use the one w/o brake. Score thus far: one mule deer buck, taken at 210 yards and one pronghorn buck, taken at 265 yards. The 140gr. AB has again proven to be very effective.
Steven in DeLand, FL
I wonder why the BOSS has not caught on with other firearms manufacturers, to be more widely used? I have never liked the "lump" on the muzzle end of any firearm, but for tuning in groups like that, I can accept the lump. The muzzle brake gives no advantage worth accepting the blast that it creates, so of the two BOSS attachments, I will only use the one w/o brake. Score thus far: one mule deer buck, taken at 210 yards and one pronghorn buck, taken at 265 yards. The 140gr. AB has again proven to be very effective.
Steven in DeLand, FL