Here's 4 groups shot with the above caliber. The 300 yd. groups are 3 shot with Retumbo powder and the last two at 400 yds. are 5 shot using the 300 gr. Sierra Match King HPBT using 117 gr. 50 BMG powder. Haven't got a chance to shoot it at long range yet but it won't be much of a problem out to 2000 yds. to hit some steel. First two shot groups on the left were shot with a Sierra 250 gr. Match King and last two fired with 300 gr. Match King bullet. Less than optimum conditions existed at time of testing as it was gusty and just a little windy!! The rifle will do better than this!