What are you guys using for reloading 308? I haven't reloaded rifle yet just pistol and am not sure what everyone is using. Yes, I did read the reloading manual just looking for powder opinions.
I'm reloading 308 for my Norinco M14 (M1A). I tried 9 different powders to see what it likes.
Here is what I tried. All loads were Remington once-fired FL sized brass. I used CCI Benchrest Large Rifle BR-2 primes. Hornaday 155gr A-Max 30 cal 308" bullets.
I loaded 10 of each powde using a middle of the range load in all. I have 7 sources for data. Hornaday #8, Speer #14, Lyman 39 (I think), Lee, Barnes, Nosler, and Hodgdon's Data site (basically the Lee data from what I can see. I took data from every manual for each powder if I have it. I took all the starting loads for a given powder, added the grain values, and divided by the # of entries to get an average. I did the same for each manual's Maximum loads. I then chose a grain weight halfway in between the average for the minimum and maximum average numbers. I checked to make sure it did not exceed any manuals maximum, and if it did not, that is the load I used. I did this for every powder I had.
I used Vihtavuori N-140, Win 748, IMR 4350, IMR 8208XBR, Hodgdon Benchmark, Hodgdon H322, Hodgdon Varget, Hodgdon 4895, and Hodgdon BL-C(2).
The best groups were shot with Vihtavuori N140 and Hodgdon H322. Almost no difference. Hodgdon Varget and IMR 8208 XBR were close runners up. Win 748 and Hodgdon BL-C(2) were a little bigger groups. Hodgdon 4895 wasn't too great. Finally, IMR 4350 and Hodgdon Benchmark were very open with a couple fliers in each group.
I reload in bulk for practice with Varget because I have 16lbs of it. For my match reloads, I use 322 because it meters so consistently.
Those are my results. In my experience, every rifle prefers a different powder. This may give you a starting point, but I do encouraghe you to try a few and see what YOUR rifle likes.