corey012778

Gee whiz, I do not know... but you are talking about backing off the T7 on the 405's....

I shoot .458/300 grain Noslers MMP orange sabots with 110 grains of T7-2f in the inlines and .503/460 grain Bullshops conicals with 90 grains of T7 in the Renegade with the GM -LRH barrel. Really get good accuracy with both. You might just need to drive them a little faster - maybe 90 grains of T7 for all of them in the USAK....

Do you normally use a #11 magnum cap of some sort?

Just thinking out loud