The Firing Line Forums - View Single Post - Reloading 308 240 grain sierra match king bullets

Bart B. · August 20, 2013, 07:19 PM

Try working up to 42 grains of Re17 or IMR4350 under Sierra's .308" 240-gr. HPMK bullet. If you cannot seat the bullet without crunching the powder to fit your chamber, you'll need a longer throat in the barrel. David Tubb shot 250 gr. HPMK's in his long-throated .308 Win. with 42(?) grains of IMR4350, as I remember, he got 2150 fps from his 28" barrel with it. Note you'll need a 1:8 twist to stabilize those bullets enough for good accuracy. Some web sites listing loads for the .308 Win. using that bullet list more powder and muzzle velocity; I'd avoid them like the plague!!!!!!!

If one checks the wind drift at 1000 yards using a Sierra 30 caliber 240 HPMK at 2200 fps or a 250 HPMK at 2150 from a .308 Win., they'll see why a long throat 28" barrel is a winner when that cartridge has to be used. . . .earlier Palma matches. Both bullets need to be spinning over 190,000 RPM to stabilize them.

August 20, 2013, 07:19 PM	#4
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Try working up to 42 grains of Re17 or IMR4350 under Sierra's .308" 240-gr. HPMK bullet. If you cannot seat the bullet without crunching the powder to fit your chamber, you'll need a longer throat in the barrel. David Tubb shot 250 gr. HPMK's in his long-throated .308 Win. with 42(?) grains of IMR4350, as I remember, he got 2150 fps from his 28" barrel with it. Note you'll need a 1:8 twist to stabilize those bullets enough for good accuracy. Some web sites listing loads for the .308 Win. using that bullet list more powder and muzzle velocity; I'd avoid them like the plague!!!!!!! If one checks the wind drift at 1000 yards using a Sierra 30 caliber 240 HPMK at 2200 fps or a 250 HPMK at 2150 from a .308 Win., they'll see why a long throat 28" barrel is a winner when that cartridge has to be used. . . .earlier Palma matches. Both bullets need to be spinning over 190,000 RPM to stabilize them. Last edited by Bart B.; August 20, 2013 at 07:26 PM.