I,m new to this cartridge and was wondering what powder choice is good for bullets from 36gr.- 50gr. also what kind of grouping should I expect at 300 yards. Thank You for any information.
I have the rem 700 with heavy barrel 24" i think. I use Varget with the 50gn V-Max with great success. IDK about 300 yds groups but it does a fine job on prairie dogs at that distance. It does put 10 shots inside a quarter @ 100 yds all day long
I shoot a Mauser 98 .22-250AI with either 36 gr Barnes Varmint Grenades or 40 gr Sierra Blitzkings. Will consistently shoot about .9 moa when loaded with Varget. This has been my best powder to date.
There is some excellent information contained in that article that should answer nearly any conceivable question about reloading for the 22-250.
As for accuracy expectation, that is highly dependent on what you intend to do with your rifle. If it is a lighter sporter intended for predator hunting, MOA or better with factory ammo is sufficient. However, if you intend to varmint hunt with it, you will want more in the neighborhood of 1/2 MOA with factory ammo (or at least a good handload).
FYI, I recently had my 22-250 re-barreled because it wouldn't shoot factory ammo under an inch @ 100 yards and my best handloads couldn't do better than .6" @ 100 yards. I wasn't happy with that. YMMV...
40grn pills- Imr8208xbr or RL10x, 1/4 moa and 4250fps+ with either.
50-53grn- H4895 or Imr3031, groups about the same, speeds between 3830 and 3940fps.
55grn-Imr4064 or Varget, still holds about 1/4moa at around 3760fps, I can go over 3850fps with CFE 223 or Ar-comp but accuracy is only about half as good.
Varget, RL10x, 8208, H322, H380, BLc2. That should atleast give you some options for being able to find a powder that's actually on a shelf for sale now. I've had good luck with all of them working in my guns. If you can go with heavier projectiles, H414, H4831sc, and RL-15 work really good.
The op says he wants to shoot 36-50grn bullets, so really Varget and H380 are to slow. I can't say how the 300yrd grouping is, but my go to 40grn Nosler BT load is 35.5grns of RL10x in Lapua brass with CCI BR2 primers at saami length 2.35", it averages 4280fps and at 100yrd you can cover 10 shots with a nickle. Last summer I exploded a ground hog at 436yrds, he wasn't concerned with the grouping! I shoot this load at a 14" square steel plate at 525 all the time and its pretty easy.
My powder of choice, would be, XMR 8208, then Varget, and then H380.
The 8208 is very consistent, ES, SD are low, velocity high, accuracy incredible. For the 36-40 grain bullets, I think it would work very well. Enjoy.