I have been doing some playing around with this idea at different calibers, and I think it might be an idea to shorten the design slightly as it would then scale better.... If we shorten it to 1.50 cal. long, it reduces the weight about 4 gr. and gives this design in .25 cal.... SD = 0.091 for the 40 gr. version.... BC should be about 0.08....

This bullet can then be scaled up exactly to .30 cal and still fit in the MRod and Flex mags.... SD = 0.111 for the 70 gr. version.... BC should be about 0.10....

I haven't drawn it yet, but if scaled up to .357 cal the weight would be 110-118 gr.... and if scaled down to .22 cal it would be about 25-27 gr.... Half the length of the bullet is supported by the barrel, which would increase the stability in the bore a bit.... and I think the weights are more realistic for high powered PCPs without having to get silly about the required FPE.... To reach 950 fps, this design would require 50-54 FPE in .22 cal.... 75-80 FPE in .25 cal.... 130-140 FPE in .30 cal.... and 220-235 FPE in .357 cal.... I think that is a good balance between the desire for a heavy bullet and the ability of the more powerful PCPs available today.... At 850 fps, the required FPE drops by 20%....

On the other hand, there is an advantage to using longer, more slender designs in the smaller calibers, to take advantage of the reduction in SD they give for the same shape.... This would mean making the .22 cal longer, and the .357 cal shorter to keep the SD constant....

Bob