62’s down range

Thanks Gunner, I appreciate the promo. Don’t worry about the miff, I know no harm was intended. I just have to watch out for folks that read one thing, take it as fact and then spread it all over the net. Then there are folks like our resident troll that just make crap up but that’s a whole different thing.

I was just killing some time during a boring phone call comparing the values that the generic calculator puts out with the BC values that Lee lists. Actually a pretty good correlation for a good number of slugs. I still think .123 is probably high but not by as much as I thought before. We’ll have to get some numbers to be sure.

I was happy to get a PM this morning from a fellow that was shooting 6 rings over the weekend, he said they were hitting the steel at 100 yards harder than the .22 rimfires that were also being shot. Given that he wants to buy some slugs, I’m very happy with the feedback!

Exactly, that’s why I was a little miffed to see numbers posted without any reference to the BC used or the use of such a low value.

All the BC calculations I’ve done have been with near muzzle measurements and over the chrony shots at distance (43 or 50 yards). I don’t have the time to this now for the 6 rings but maybe someone has the time. Running the numbers isn’t that hard.

BC (ballistics coefficient) isn’t an assigned factor, rather a post calculated figure.

The only way to truely create the BC is to shoot at ranges in a controlled environment of zero wind and back figure the BC.

This can be done by shooting and recording the drop and then curve fit backwards. (as no one wants to risk a chrony shot at 100 yds., but you could with a nice brick wall and a hole to the bull’s eye.)

Give me some numbers and I’ll be glad work them for you.

Looks like you jumped out a little ahead of what you knew when you posted those numbers.

The BC of a 6 ring is probably at least double the figure you used. If you plug the weight into a generic calculator that uses weight and diameter along with basic shape (I used semi-wadcutter/HP as that was the worst case) the estimated BC comes out at .123. That’s probably optimistic but I’ve done a lot of BC testing on other slugs and I’ve got some rough data on the 9 rings that leads me to believe we’re at least .05 on the 6 rings.