- Oct 23, 2006
Is there such a thing as a control load for the 270? I’m thinking a 130gr bullet over H4831? The question is, what bullet to start with. The BT is always a favourite in just about any cartridge.
I would say something like a 130 gr Ballistic Tip or one of the Sierra's with H 4831 sc would be about as close as you could come. Any gun that doesn't shoot those well probably has issues.
I have heard from three others having success with RL22 and 130 AB/PT, just under the Nosler Data maxI struggled with the 4831s in my daughter’s 270 with 130 and 140 grain ABs then tried 7828 without any luck either. I was really scratching my head, as these had always delivered the goods in our other 270 rifles. Someone mentioned trying RL22 so I gave it a try and it shot lights out!
H4831 has worked for a ton of calibers, its known to be one of the best powders. H4831 SC is the bees knees for my 6.5 x 284. Was using the 147 ELDM and 49 grains pushed that bullet so slow, 2600 + fps and 49 grains was Nosler max with the 140-142 pills. I kept adding .3 increments until it got to pressure at 2900 fps, backed off to 2825 fps at 52 plus grains of H4831SC. I swapped to hunting bullets a couple weeks back since I plan to use it for a hunting rifle due to short barrel life. I swapped to 143 ELDX and tested over a chrono, its 52.7 grains at 2890 fps. Tweaked up a few tenths of a grain to get the sweet spot. 2900 fps seems to work just fine, H4831SC / H4831 is a slow powder, but the thing I like about it is temp stability and works well with heavy bullets. I would like to test RL-26 in the 6.5 x 284 one day. Still have a pound and a half, but keeping it for the 300 Win Mag.Working on my BIL's 270 P64 Featherweight right now with 130 Accubonds and H4831SC. One thing to note I have noticed over the years is soft loads of H4831 or 22 never looked like much till you pushed them up to the 2900+ area and usually they really came alive around 3000-3050 marks. I wouldn't be completely surprised to see you have to push a few grains over Nosler's max, but still under Hodgdons, Hornadys, or Sierra's data for a 130. For some reason Nosler must've gotten a dynamite barrel of H4831 for their testing, cause it was dirt slow in a few of my rifles till I was in the 58-60 grain range.
The first powder I recommend for the 270 and 130s is RL22. Most seem to steer towards H4831, but RL22 has given me better velocity and accuracy in several M700s. Ramshot Hunter has also been very good.I struggled with the 4831s in my daughter’s 270 with 130 and 140 grain ABs then tried 7828 without any luck either. I was really scratching my head, as these had always delivered the goods in our other 270 rifles. Someone mentioned trying RL22 so I gave it a try and it shot lights out!