If you want Red Rider BB gun quite shoot the 190 gr Hornady Sub-X. Hodgdon Trail Boss powder was developed for cowboy action shoots, but reloader quickly realized it woukd load any rifle subsonic with good accuracy.
I shoot the 190gr in two of my 308s. The information I read instructed a person to fill the cartridge case to the shoulder then weigh that and multiply the weight by .75 and start from there and go down. Following those directions gave me hmmmm if I remember somewhere around 1500vfps. Since the sound barrier at sea level is 1116 fps I started reducing the load until 10.3 gr gave me 996 to 1005 fps. The powder is bulky so it fills the case well. The Hodgdon one pound canister filled to the very top only holds nine ounces.
With a Vortex scope with adjustable turrets you can reach 300 yards, and with surprising accuracy. I know it groups withing a golf ball at 100 yards. If you leave your 308 sighted in for standard loads at 100 yards you will need to click up six inches for 25 yards, ten inches for 100 yards, and 42 inches for 300 yards. You scope hight above bore and velocity will change all those settings. Interestingly when your not pushing air that hard you don't loose velocity as fast. It still smacks a six inch steel plate hard at 300 yards.
I shoot the 190gr in two of my 308s. The information I read instructed a person to fill the cartridge case to the shoulder then weigh that and multiply the weight by .75 and start from there and go down. Following those directions gave me hmmmm if I remember somewhere around 1500vfps. Since the sound barrier at sea level is 1116 fps I started reducing the load until 10.3 gr gave me 996 to 1005 fps. The powder is bulky so it fills the case well. The Hodgdon one pound canister filled to the very top only holds nine ounces.
With a Vortex scope with adjustable turrets you can reach 300 yards, and with surprising accuracy. I know it groups withing a golf ball at 100 yards. If you leave your 308 sighted in for standard loads at 100 yards you will need to click up six inches for 25 yards, ten inches for 100 yards, and 42 inches for 300 yards. You scope hight above bore and velocity will change all those settings. Interestingly when your not pushing air that hard you don't loose velocity as fast. It still smacks a six inch steel plate hard at 300 yards.
