243 powder

I had really good results with the "classic" powders like H380, H414, and I think w760. But man I've heard good things about H4350, Varget, and I think RL15.

I'm sorry I pulled a brain fart here. Though I did use H380 with 80gr BT's I liked H414, W760 and IMR4350. I like H380 better in a 22-250 with 55gr BT's. I really wanted to try H4350 but sold the rifle to a buddy for his wife.
 
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You're looking for a mid-range burn speed that's leaning just a little bit toward the slow side without getting to be a full magnum powder. This is one of the most heavily stocked areas of rifle powder options with literally dozens of great options. Assuming a 24" barrel and velocity being your goal your best results will be along the lines of: reloader 17, H414, Superformance, Varget, H4895, IMR 4895, Hybrid 100v, BL-C2, 4000-MR, and similar powders that are at home in overbore cases with bullets in the middle range of weight for caliber. Any of those should turn in high 3200's to mid 3300's easily. I prefer ball powders like H414 & BL-C2 for ease of metering. BL-C2 also smells great to me when it's burned.
 
I would start with IMR 4064 IMR 4895 IMR 4320 or some other powder in that burn rate. In my experience with the 243 Win., Since I965 I have found there seems to be a break line from Medium burn to slower burn powder between the 80 and 85 gr bullets in a 243 win. At 85 Gr. and above I look to H4350, IMR 4350, IMR 4831 or H 4831 burn rates. Good Luck in finding a load that will perform to your needs.
 
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