Hey Good mornin fellas.
I got some fuzzy thinking going on, and I'm hoping one of you can sort me out. Here is what I got:
Modern long range guys I have heard said that things go wonky out at extreme ranges. I think I heard some .338 Lapua guys saying that when their bullets go subsonic out at some ridiculous range like 1300 or 1400 yards or so - everything goes off the rails and hits beyond that become a matter of luck as much as marksmanship. As the modern centrefire cartridges get smaller, those ranges get shorter. (I think the .308 guys said they go subsonic at 800)…
Whatever!
But after hanging out here and with some help from you guys - I am doing alright with my 45-70 going approx. 1180 FPS. It does well out to 300 which is the maximum extent my range goes. But... my loads are starting off at almost subsonic velocities, and I don't think even my fine home made Postells come close to the BC of say, a match .338 pill.
I guess my question is... why do our guns shoot so well at subsonic velocities and the modern jacketed calibres don't? Is it entirely a matter of bullet mass?
Hope ya got something fun lined up for the weekend - your two cents, as always, is sincerely appreciated!