While resizing some Spotter Tracers (822 gr) I found that some of them were quite out of round below the cannelure and wondering what you guys think about usability.
On this particular bullet, measuring below the cannelure there is a .009 diameter variance as the calipers pass over a flat spot. There are generally significant pull marks on API, APIT bullets but the Spotter Tracers seem to be the worst as far as overall out-of-whackness and there are flat spots like this on some of them.
The majority of API and APIT are within a thousandth or two of "round" after resizing.
Will this cause any undue barrel wear or make any bad juju aside from some accuracy loss? These should be only approx 1700fps with a reduced load of 170gr powder whereas a 606/647 grain API or APIT will have around 220 grains of WC867 or H50 and go 2700fps or so. Will be using an M99 with 32" barrel.
One guy's opinion when I brought this up a while back, was that the rifling is so aggressive that it's not going to matter by the time it leaves the end of the barrel.
Thanks for your insight.
On this particular bullet, measuring below the cannelure there is a .009 diameter variance as the calipers pass over a flat spot. There are generally significant pull marks on API, APIT bullets but the Spotter Tracers seem to be the worst as far as overall out-of-whackness and there are flat spots like this on some of them.
The majority of API and APIT are within a thousandth or two of "round" after resizing.
Will this cause any undue barrel wear or make any bad juju aside from some accuracy loss? These should be only approx 1700fps with a reduced load of 170gr powder whereas a 606/647 grain API or APIT will have around 220 grains of WC867 or H50 and go 2700fps or so. Will be using an M99 with 32" barrel.
One guy's opinion when I brought this up a while back, was that the rifling is so aggressive that it's not going to matter by the time it leaves the end of the barrel.
Thanks for your insight.
