I've tried everything out there, and honestly I think they are all probably a good choice. There is however a new powder out there called Reloader 10X. I staretd using that in my 22-250 and it's AMAZING. I had a CZ I was going to get rebarreled because I couldn't get it to shoot as tight as I wanted. Myself and a friend started using 10x and WOW. What a powder
I'm not talking about a 22-250 but I too am a fan of 10X. Awesome shooting powder in my .204 Rem VLS. I tried several powders in this gun but 10X won me over quick.
Nobody has mentioned this but not only is accuracy good in a powder but if a powder burns clean in your gun and shoots great, what more could you want.
Thats what you get with 10X....Unbeatable accuracy and a cleaner bore than some other powders offer.
On another note, check this out...
Example: My 22-257 had great performance with IMR 7828 but was always very dirty after a few rounds. Accurate but dirty. I switched to H4831SC and had the same accuracy but much, much cleaner. I can maybe shoot 3 times as many rounds with the Hodgen powder between cleanings.
The 22-257 has alot of powder coming out of a small hole so powder choice is a big issue. Thats 47 grains of powder out of a .224 caliber.
I didn't mean to add so much about other stuff in your thread, just wanted to give you something to think about that no one else mentioned when selecting a powder and wanted to give you a good example.