Thanks. I just found this info on the Weaver sight about my scope. It lists the "adjustment range MOA" as 37.70/1.05.
Does that mean anything to you?
37.70” adjustment at 100 yards = 36moa internal.
That’s equivalent to 1.05m at 100m, so that’s what the 37.7/1.05 means. 37.7” at 100yrds, aka 1.05m at 100m.
Also, it does appear your scope is an IPHY base, not true MOA, with 1/8” per click per hundred yards, so keep that in mind.
So… with that scope and that load - you can’t use any 30 or 40moa base or rings. You can only use up to about 28moa, at very best, so a 25moa Burris insert combo (20+5) would get you almost as much range as possible (around 270 yards), without cutting off your short range, and 20moa base or rings would get you to 200 with no issues.
***Long Version***
That 37.7” at 100yrds is 36moa, meaning optical center is 18moa from either end… stick that on a flat rail on top of a rifle, around 2” optic height (~1moa), and then 200yrds will mean an absolute drop compensation of ~60”, 28.6moa, so you’ll need ~30moa of “up” available just to reach 200yrds… 30moa needed minus 18 available is ~12moa of rail/ring offset needed. Adding a 20moa base would put you ~8moa from the maximum “up” dial available, meaning you’d have 24moa left “down” from 200yrd zero… and you’ll need ~21moa “down” from 200yrd zero to be able to dial for close ranges (peak is ~45yrds)…
If you add a 40moa offset, you will not be able to dial back to short range. 40yrds would need 9.5moa “up” from optical center, but adding 40moa offset puts you at 30.5 “down,” from optical center… but you only have 18 down available… knock down to 30moa angled base or rings, and you’ll still be at 20.5 “down,”with only 18 available… Adding a 20moa base puts you 10.5moa “down” from center, with 18 available, so 20moa works.
With that scope and that load, you could use Burris rings with one 20 and one 5moa insert set, 25moa total, and you’d end up ~3moa from maximum “down” at 40yrds, and have ~34moa available, which would get you to 200, even ~270 yards.
So get a 20moa base or rings - if using Burris rings, use 25moa total insert - and shoot to 200. Do not get a 30 or 40moa offset… at least not for that load and scope combo.