hi, not sure where it would be best to post, so, will post here.
i got puzzled a bit today at 300yds.
i have no reason to think my chrono is off, as it shows numbers rather consistently on all my loads, and i think it matches correctly - and chrono did show me correct speed posted on the factory match loads i have. so, that makes this a point of truth for speed, i hope, no reason to think it is lying.
then, so, i get those bullets - hornady eld match, 140gr, G1 coefficient .646 as it says on the box. speed i have is 2786. zeroed at the 100yds, scope sits at 2" - well, may be 1.8".
i give all that to the calculator, it gives me an anticipated 3.69 MOA drop. the real dialed in drop amount on the turret ended up to be 5 MOA. it is quite a difference from what calculator says - is it typical? if i set scope height as 1.75" it only alters drop to 3.85MOA, that is still quite off.
i did some checks and with the given 5 MOA drop for 300yds it says it should have been 2483 speed. the presumes chrono lies by a 300fps? not very likely. but, if not that, then what is it?
scope sits on the 20 MOA rail - can that be a factor? i am just confused quite a bit with this. scope is vortex pst2 5-25x, so, presumably its turrets should be accurate.
i got puzzled a bit today at 300yds.
i have no reason to think my chrono is off, as it shows numbers rather consistently on all my loads, and i think it matches correctly - and chrono did show me correct speed posted on the factory match loads i have. so, that makes this a point of truth for speed, i hope, no reason to think it is lying.
then, so, i get those bullets - hornady eld match, 140gr, G1 coefficient .646 as it says on the box. speed i have is 2786. zeroed at the 100yds, scope sits at 2" - well, may be 1.8".
i give all that to the calculator, it gives me an anticipated 3.69 MOA drop. the real dialed in drop amount on the turret ended up to be 5 MOA. it is quite a difference from what calculator says - is it typical? if i set scope height as 1.75" it only alters drop to 3.85MOA, that is still quite off.
i did some checks and with the given 5 MOA drop for 300yds it says it should have been 2483 speed. the presumes chrono lies by a 300fps? not very likely. but, if not that, then what is it?
scope sits on the 20 MOA rail - can that be a factor? i am just confused quite a bit with this. scope is vortex pst2 5-25x, so, presumably its turrets should be accurate.
Last edited: