dmaxguy2008
Member
So I have had this gun for a couple years now(m700, McGowan 28" tube, trued action, BC medalist/tactical stock, Bushnell elite 3200) Took an elk 2 years ago at 350-400 yards don't remember exactly. I know that's seems irrelevant but point is with a 140 going 3390~ at the muzzle it with drop and elk like a bad habit at that range.
Anyway I've been shooting 140 Berger hunting vlds using cci 250 primers and 80gr of H1000. Recently went out with a buddy shooting rocks. We shot at 845, 1120, 1450, and 1625yrds. I was using a program called Strelok Pro for a drop chart. And I must say it is awesome! Dead nuts to 1450! After that I believe I was encountering problems with my scope. Where it called for 39moa I had to dial back to 32moa to hit center as far as elevation. But after dialing down to 32 moa we shot at 845 dialed it into the scope and it was right on. I am guessing that because I was close to the end of my travel it was affecting the actual adjustment in my scope. A side note I have been unsuccessful finding 7STW brass anywhere!!! Been forced to try Bertram 8mm rem mag brass. Had to beat every shell out of the chamber. Very frustrating. On a positive note I hit a rock that was 3.5'x4' 3for3 @1620 probably the most excited I've ever been while shooting! If we get back over there soon I'll post some pics of the impacts. For if there's not pics it never happened
Today I decided after I fire formed all of the 8mm brass I would try and figure out the sticking problem. I trimmed and deburred all of the 8mm brass. Loaded three rounds with matrix ballistics 160 vlds. Used 76, 76.5 and 77gr of H1000. First shot chrony'd at 3231 case stuck. Second shot at 3270 case stuck. Decided to stop there. Came back and measured the necks and OD and thickness both fired and unfired. Seems the 8mm brass would benefit from having the necks turned down. Wall thickness on the 8mm was .014 vs .0105 of the 7 stw brass.
Don't take any of this info as gospel I'm nobody. Just some guy that lives in the middle of no where that has a bunch of guns and likes to shoot them.
Anyway I've been shooting 140 Berger hunting vlds using cci 250 primers and 80gr of H1000. Recently went out with a buddy shooting rocks. We shot at 845, 1120, 1450, and 1625yrds. I was using a program called Strelok Pro for a drop chart. And I must say it is awesome! Dead nuts to 1450! After that I believe I was encountering problems with my scope. Where it called for 39moa I had to dial back to 32moa to hit center as far as elevation. But after dialing down to 32 moa we shot at 845 dialed it into the scope and it was right on. I am guessing that because I was close to the end of my travel it was affecting the actual adjustment in my scope. A side note I have been unsuccessful finding 7STW brass anywhere!!! Been forced to try Bertram 8mm rem mag brass. Had to beat every shell out of the chamber. Very frustrating. On a positive note I hit a rock that was 3.5'x4' 3for3 @1620 probably the most excited I've ever been while shooting! If we get back over there soon I'll post some pics of the impacts. For if there's not pics it never happened
Today I decided after I fire formed all of the 8mm brass I would try and figure out the sticking problem. I trimmed and deburred all of the 8mm brass. Loaded three rounds with matrix ballistics 160 vlds. Used 76, 76.5 and 77gr of H1000. First shot chrony'd at 3231 case stuck. Second shot at 3270 case stuck. Decided to stop there. Came back and measured the necks and OD and thickness both fired and unfired. Seems the 8mm brass would benefit from having the necks turned down. Wall thickness on the 8mm was .014 vs .0105 of the 7 stw brass.
Don't take any of this info as gospel I'm nobody. Just some guy that lives in the middle of no where that has a bunch of guns and likes to shoot them.
