I have not, but I do have some 2000MR to tryHello jwp, have you ever tried Norma 203-B?
Getting over 2700 with Ar2206-got the powder back in the late 90s about 2 years before it turned to 2206H. 340gr Woodleigh weldcore. Under 1" groups at a hundy. Notes say 21 November 97
repeatable as I lent it to an acquaintance who had some of his own 2206 and achieved the same accuracy although he didn't listen to what I told him about the load and went a grain under.
My notes showed an average of 2770fps with an average of the low shot at 2730.
10 shots.
under book max too. only tried 2 loads and 3 shots of the lesser one.
Well if he is like me he is trying to use it on game like deer.What will you use 350 gr softs for? I can get 2550 using 400s out of my Taylor, but it's not necessary with such a high SD and E bullet (2,450 is ideal and just under 6,000 ft-lbs of E.) Yours is now behaving like little brother 375 with lower SD bullets (fine for PG and American game, but not ideal for the 416s purpose-DG.) Some are wise to use the even heavier, high SD (penetrating power) 450 gr bullets on DG (with even lower V but higher SD and E for penetration and damage). A 350 solid would do the trick, but not ideal for the 1st shot.
It would be the perfect Kodiak Bear load in my perspective
Any sign of over pressure?