Some may find their site useful jbmballistics.com .... I use the “lengths” info when looking for bullets that will seat with COAL to fit in magazines. Can save the frustration of buying a 100ct box to find out they are too long.
It really is an excellent site. They have a raft of useful programs on there. The ballistic calculator is great for checking atmospherics on bullet trajectory and their pressure info is also useful.
JBM ballistics
Linear Mode
