Originally Posted by soundwaves
OK what the balistic programs say and some of you guys sugested was;
a 7mm rem mag shooting a 175 grain PSP bullet at 2860 f/s it would hit 4 inch high at 100 yards and dead on at 300 yards. but went shooting today at an altitude at see level and it was 4 inch high at 100 yards and 4 inch low at 300 yards??????? going back to the 150 grain bullets from now on. can any one sugest me a good scope with balistic reticals that suits the 7 mm rem mag???? thanks guys
Something is not right here. No way should your bullet should be hitting low @ 300 yds if you are 4" high @ 100 yds.
A 175 psp should have a BC of at least .5 and using that and 2860 fps (which is a very reasonable guess of actual velocity) I am getting a 310 yd zero with bullets 4" high @ 100 yds @ 5000" elevation. I'm alos using 1.8" sight height.
The 150's will shoot flatter.
I think most BDC reticles are calibrated for about 3000 fps which should be close to factroy 150's.