Threading a Needle - chronographing at 500 yards
Yesterday we did an interesting test. We found a cheap clay material that sets up like plastercine and made up about 75 pounds. We put the clay into grocery bags, ended up being 11 inches square and three to four inches thick (made a plywood jig to prepare them in). Then we built a stand to hold the bags upright and butted seven bags in a line, then put some big jugs of water behind them.
Next we set up one of my chronographs directly in front of the clay targets, then arranged a large steel plate in front of the Oehler screens to protect them. The plate was 2'x4' and we hung it from an old swing-set. Took about an hour to set this up.
We started off shooting from 500 yards with a very accurate Rem.700, 26" Mike Rock barrel and a Nikon 4x-16x tactical in Badgers and Nears. Wind was varying 1 1/2 - 2 1/2 minutes left to right. We managed to put five bullets through the Oehler screens and caught seven in the clay.
Bullets were the new Barnes 168 XLC and penetration was 30", impact velocity was 1763 fps and expansion was perfectly uniform with no weight loss - six bullets weighed 168.0 and one came in at 167.9. These bullets shoot extremely well, virtually no difference from the match bullets.
Repeated at 400 yds with 28" penetration and 1919 fps with the same retention.
Beautiful "mushrooms", just like in the ads. I haven't measured them yet but you can see that the 400 yd. bullets are slightly bigger in cross-ssection than the 500 yard mushrooms.
Bullet smack on impact was identical to hitting a game animal. This is good stuff to test bullets with. We need to find a metal detector, would speed up locating bullets a bit but we did not really have much problem as the bags were only 4" thick.
Thought you guys might find this an interesting little test, we plan on doing a bunch more. My partner shot very well, his rifle liked the XLC's and we got nice info.