Fially found my data records for the 375 Whelan. I created my own alloy a mixture babbit metal, wheel weights and a bit tin water chilled at casting, sized .378. The bullets were lubed with LBT blue Using IMR4064, IMR 4895, IMR 4350. With all the bullets, very hard alloy proved to be very accurate at all ranges 100 yards to 400 yards off the bench rest. You'll soon learn to not not shoot any of the heavier loads off the bench for extended periods. Enjoy!
