Re: H4831sc for .270win with Hornady 130gr SST
The 60.0 grain H-4831 with most 130 grain bullets has been pretty well standard for .270 loads since this powder became available back before many of us were born. I found it a great load with the Hornady Spire Point; Speer Spitzer and best with the Sierra 130 grain Pro Hunter. You will find however, that your rifle may not handle this load without pressure signs. It will vary rifle to rifle and bullet to bullet. Just start low and work up to it, or in some instances beyond, if zero pressure indicators are present.
As to the 140 accubonds, I love that bullet also. Lately I have been getting +3000 fps and outstanding accuracy with the AB, the SST and the Berger 140 VLD. This is out of my Ruger tang safety, 22" barrel and IMR 4831. Not 60.0 with this powder, but 58.0 grains of the IMR. Cleary max in my rifle. My son's A-Bolt Stainless Stalker loves the 140 AB with 57.0 of the IMR 4831 and CCI BR-2 primers. Again, this is max for his .270. My apologies for running off at the mouth, I just feel like blabbing this morning.