I'm shooting off of a lead sled with a 35lb Olympic barbell weight in it. It's solid. I have no issue holding on target.
Can you elaborate I little more on the scope failures? Considering 22-250 recoil is virtually non existent. Not arguing with you at all. Genuinely interested.
The lead sled is worse than just scope failures. It also broke my recoil pad on a 458 Lott. It can break stocks, bedding, numerous issues. Not to mention it is horrible for developing good bench technique.
Most of this comes from a conservation of momentum, force application to a moveable object viewpoint. Basically, how much force can you apply to a Kia bumper before it moves vs an F350.
What happens is that recoil impulse gets split into force applied through the rifle and rifle movement. We want the gun to move, under recoil, when the gun fires similarly in the bags and in the field.
Now, you are talking 22-250. You probably won't break anything….but will your zero be different?…yep will your groups change, yep….at least in my experience. I'd much rather see you, or me, shooting off a rock solid leather, sand filled, dry, lubed FR & RR rest with a light contact to the shoulder.
I have it in a MDT chassis. Didn't care for the factory stock at all.
Those too can be tricky as they are not well dampened, but if it fits and you like it, it should work.
So 35.3gr shot the best. 5rnds @ 100yds 1" group.
According to Hodgdon, they recommend a range between 36 - 38.2gr(please check the data yourself) with IMR 4350, 70gr Speer SP @ 2.330". Did you try anything in this range? Your bullet is a tad longer, I would bet so you will likely see pressure over 37.7gr. At 0.02" off the lands, I would guess you might be long enough to not see that pressure point.
I guess I'm saying is there a higher node that is better?