Try a speer manual. I have an old one that has info on 80 gr. Also, and this is my opinion, you can do the following:
Find 75 gr and 85 gr data using the same power. Let's say 40 gr of "X" powder is a max for a 75 gr bullet. And...36 gr of same powder is max for a 85 gr bullet. Common sense would say that about 38 gr would be max for a bullet in the middle...80 gr. THEN...back off 10% and start reloading and work up. All bullets have different bearing surfaces, jacket thicknesses and core densities. It's best to find commercially available loads for the exact same bullet you are using but you can get a basic idea thru the backdoor. A chrono is good to watch for things along with the other common advices on signs of pressure.
Post by sourdough44 on Jun 11, 2014 16:35:32 GMT -5
Yes, and if it's standard 'cup & core' bullet, you could just use 85 grain data. I usually don't see a need to hang out at max pressures anyway. What powder do you have on hand to try? I'd look to a medium burn rifle powder for that bullet, in the Varget to slightly faster range.
I'm using Hornady brass from the same lot that is weight sorted into two smaller lots . Flash holes preped and case length all uniformly cut to minimum . I am using Federal Match Large Rifle Primers ... same lot , of course . The best load so far has been a Nosler 70gr. Balistic Tip over 42.5grs. of Varget . This is a half a grain over their accuracy load for that bullet . It is slightly under 1/2" at 100 yards . Yes , some days slightly over 1/2" at 100 yards . The speed is about 3535 fps at 10 feet . I tried IMR 4350 with the Remington 80gr PowerLokt bullet with the same brass and primer combonation with poor results ... 1 1/2" at 100yds. Next I tried 40.0grs of IMR4064 and it grouped 3 shots in .465" at 100yds.with no signs of excessive pressure ( at 65 degrees ) . Didn't get to chronograph that load yet but should be about 3300fps. For a stock Remington heavy barrel varmint rifle with a Timney trigger set at 2 1/4lbs this ... for me ... is good shooting .