05-14-2022, 12:43 AM
Got a chance to get to the range today for a little load testing. First up was the 129 gr ABLR over 26.1 and 26.4 gr of AR Comp. the first three shots of 26.1 printed well and then m y rifle threw the 4th shot as it is prone to do. She likes a cold bore. The second charge of 26.4 was 1-1/16" which was nice.
the second round of testing was some 90gr TNTs over 8208 XBR. these loads ran from 29.4 up to 30.9. the first load of 29.4 posted a group at .75 " even with a SD of 29 and an ES of 84. not great numbers there. 30.6 gr shot the same .75" group with SD of 9.4 and an ES of 22. All loads were with CCI 450 primers and Hornady brass. Overall I was happy to get a good alternate hunting load in the 129s with almost the same point of impact as what my rifle is sighted in for with Sierra 120 gr Pro Hunters. The TNTs will make a nice plinking load with a small sight adjustment.
the second round of testing was some 90gr TNTs over 8208 XBR. these loads ran from 29.4 up to 30.9. the first load of 29.4 posted a group at .75 " even with a SD of 29 and an ES of 84. not great numbers there. 30.6 gr shot the same .75" group with SD of 9.4 and an ES of 22. All loads were with CCI 450 primers and Hornady brass. Overall I was happy to get a good alternate hunting load in the 129s with almost the same point of impact as what my rifle is sighted in for with Sierra 120 gr Pro Hunters. The TNTs will make a nice plinking load with a small sight adjustment.