H4895 or another temp stable powder for 22-250 with 50-55 gr bullets.
Here are some other things you might consider.
H4895 is about a .55 burn rate
IMR 4895 is about .52 but maybe not as temp stable. Widely available right now. Go to Third Generation Shooting Supply or
Defender Distribution sites.
There has been a lot of IMR 4350 available. It is about .5150 but is also not guaranteed temp stable.
The Enduron IMR series is temp. stable and so these may work
IMR Enduron 4166 - .5890 avail on Defender Distribution web site right now.
IMR Enduron 4451 - .5750
IMR Enduron 4955 - .4910 Available right now on Defender Distribution
Or if you really want it and want to pay, you can go right to gunbroker.com and buy H4895 anytime at a premium.
And there were primers advertised for sale here on this site galore last week. Small and large rifle, and large rifle magnum.
Mostly at Midway and Brownell's. Some at Natchez and some at Powder Valley. So, watch the classified adds under reloading components and be ready. They last anywhere from 20 min. to an hour at most once posted. All most everyone on this site who
was watching and wanted primers probably got some last week. At least I hope they did.
H4895 is hard to find. I have purchased myself, Varget, Retumbo, H1000, N570, N560, N565, Reloader 17, RL 26,
IMR 4064, IMR 4895, and N568 and large magnum rifle primers in the last 6 months just by watching and being ready.
I have only seen H4895 a few times. I have never seen powders like Trail Boss which are imported.
I have sold and traded Varget several times for RL 26, and I have sold RL 17 and IMR 4064 it turned out I did not need.
If you want something that's temp stable that shoots well in a 22-250, just ask folks here what else they are using other
than H4895.
You will find there are lots of other powders that work well that can be found. At least I sure think so.