I have a ? you guys. I built a mauser and I kept it in the original chambering of 8x57. I have been working up a load for it for about 2 months now and I am pretty sure I am going to stay with this. It is the third time testing this load and this was about the average for the other 2 times. I shot this at 300yds. The bullet is going 2520fps 10ft from the muzzle. The bullet has a BC of .520 above 2300fps, .505 from 2300-1700a and .461 from 1700 and down. Do you guys think it will still be stable at 1000yds? If not, what would be the max before it slows too much. I am not after a hunting load. Just something to shoot at water jugs and ballons at this range. 600 will be about the max for varmits.