DT, the last few week I have been reading what you and Beltfed (Arnie ?)had to say about two diameter ppb’s. I’m thinking of getting a mold cut and have a question on the larger diameter section, btw it will be for a .45-2.1. The few photos of two diameter bullets I’ve seen it shows the larger diameter section over one caliber long. This would make the larger diameter over .450” in .45 cal. I see two negatives with this long section. One, it takes up too much space in the case, no big deal in the longer cases but in .45-70 it can be a problem for long range. Second, there is less bullet length patched to .450” for bore riding and alignment. Do you think one can get away with the larger diameter “belt” being around .125- .135” long, or even less ? My Browning bpcr has no freebore but just a 45 degree angle from chamber wall to the rifling. I don’t think, even with that short of a belt, one would get stripping and one might be able to use a harder alloy than 16:1 to better hold nose shape.
Thanks for your thoughts and comments.
Regards, Richard