45bisley, I shoot a 335 & 370 gr. WLNGC in a .45 colt but I have a 5 shot R.H. with a 4 inch barrel. My 335 gr. bullet has a .565 long nose. and the 370 gr. has a .505 long nose. The 335 gr. my regular load is 25 grs. of WW-296 and a large mag. Fed. primer. My hunting load is 31 grs. of WW-296 and a large mag. Fed. primer. I have loaded 32 grs of WW-296 behind this bullet but it was not as accurate as the 31 gr. load. The only 370 gr. load I have tried was 25 grs. of WW-296 and a large mag. Fed. primer. This mold was supposed to through a 340- 350 gr. bullet. But came out at 370 gr. This load shot so well that I didn't try any other loads. I then had Mr. Smith at LBT cut me a mold for the 335 gr. bullet. Sorry that I don't have a Bisley and not a 405 gr. bullet mold. Hope this will help. All the above loads are safe in my gun. I do not have a chronograph so I don't know what the speed of these loads. Good lock Jack K.
Never tried the 400+ grain bullets, but have been shooting a 335 out of my Bisley. I don't run them real fast. 20.5 grains of WW296 in Starline cases with Winchester primers yields about 1150fps. This is a very consistent load, and will go through pigs lengthwise.
My guess would be that the Bisley doesn't have a tall enough front sight for the 400+ gr. bullets, but that's just a guess. The 335s are quite comfortable to shoot in my gun.
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