My sources from years ago defined the trans-sonic zone as from Mach 1.2 to Mach 0.8.
It explained rather nicely a reported "mystery" of less wind drift with 1100 fps heavy bullet loads as published by some handgun silhouette shooter (IHMSA, IIRC). Based on the loads being compared, this old Highpower shooter was muttering "I coulda told you that before you fired a single shot" while I was reading the article.
Anyway, seems like most of our discussions here treat Mach 1.0 as some sort of bugaboo point. But our beyond 1,000 people are quite often lobbing bullets which are quite subsonic on target impact.
And the worst time I ever had pulling targets was for some dude and his wife shooting club M1 Garands with M2 Ball ammo at 500 yards. Quite subsonic, keyholing and at least twice the MOA extreme spread as their 300-yard targets.
So, what bullets keep their accuracy through the trans-sonic zone? Yes, wind drift will increase dramatically, but there must be some experience on which ones go sideways and which ones don't...
Any reports would be appreciated.
It explained rather nicely a reported "mystery" of less wind drift with 1100 fps heavy bullet loads as published by some handgun silhouette shooter (IHMSA, IIRC). Based on the loads being compared, this old Highpower shooter was muttering "I coulda told you that before you fired a single shot" while I was reading the article.
Anyway, seems like most of our discussions here treat Mach 1.0 as some sort of bugaboo point. But our beyond 1,000 people are quite often lobbing bullets which are quite subsonic on target impact.
And the worst time I ever had pulling targets was for some dude and his wife shooting club M1 Garands with M2 Ball ammo at 500 yards. Quite subsonic, keyholing and at least twice the MOA extreme spread as their 300-yard targets.
So, what bullets keep their accuracy through the trans-sonic zone? Yes, wind drift will increase dramatically, but there must be some experience on which ones go sideways and which ones don't...
Any reports would be appreciated.
