Harpy- You're going to need the 32" if you're looking to burn lots of powder, it's extremely doubtful you'll be able to consume more than 100 gr. efficiently, the 3 Pyrodex pellets thing is ridiculous, the only weapon thats going to derive any benefit from 150 gr. is likely going to be crew served. If you have access to a chorograph shoot over it from a lighter charge say 70 gr. shoot 3 to 5 shot groups increase the charge in 5 gr. increments. when you see the velocity increasing at a decreasing rate you've hit the point of diminishing returns and there's no point in going much beyond that, as beyond that point your recoil, fouling and barrel erosion is going to be increasing at an increasing rate and the velocity will
increase very little. The best load is the most accurate load at the best velocity. accuracy is what you really need. I'd shoot loose powder not pellets, the only real benefit derived from the pellets is to Hodgdon and the retailer where you bought them, it's just a brilliant marketing ploy for
the rifle manufacturer as they say it's a 150 gr. rifle, the truth is as long as
the bullet is seated firmly against the charge you could shoot 300 gr. loads and the barrel isn't going to blow up or even bulge, and the Hodgdon is going to make a bundle selling the ridiculously expensive little turds, and no rifle is ever going to be at it best as far as accuracy potential
in 50 or 30 gr increments.
fredj