Although IMR 4831 and H4831SC are different powders, you'll discover that in lots of cases, the place one of these is mentioned one other might be likewise. Also, you will find there is a reasonably dependable marriage involving them with reference to stated loads.
H4831SC Powder readily available in stock now. Ballistically, this Extraordinary Extruded powder is the exact duplicate of H4831. Physically, it's got a shorter grain measurement, for that reason, the designation SC or brief Reduce. The shorter, far more compact kernels allow the powder to circulation with the powder actions additional efficiently, assisting to alleviate the continuous reducing of granules.
The fact that the H4831 is in truth a slower burning powder is specifically why you are viewing higher velocities received with that powder, rather than That which you've seen While using the IMR stuff. Also excellent powder, but rather greater suited to a little bit smaller sized situations which has a little bit much less capability.
While using the 154 grain Hornady SP during the 280, H4831 gave me fantastic groups and superior velocity, but Rottweil R905 has a appreciably increased velocity and gives marginally improved accuracy. With Swift 150 grain Sciroccos from the 7mm RM, H4831SC gave excellent precision and velocity, but RL22 was marginally greater. Consequently, in Every of these scenarios I went with another powder, but I would definitely hate to divest myself from the H4831.
Yup or it would not work effectively. And For the reason that OP contains a load utilizing Varget I'd try out to find another person to trade with. Could possibly think of a win get predicament.
I understand, rough periods. H4831SC will definitely operate, I just did not like the case density when loaded very long. I do not try to remember powder charge off the top of my head h4831 vs h4831sc but I was launching a Berger 168gr VLD at 3,000fps which can be the place I commonly goal for being. In the circumstance employing what you have (and what I ought to have done) I would get started with the top of your bearing surface area from the bullet proper in the shoulder/neck junction, and flirt with extending seating depths from there after you locate a velocity node.
If there isn't any load data it can be mainly because this powder isn't suited to this cartridge. Generally just one won't come across one powder to fit all cartridges, plus the family members of cartridges with The actual powder (4831SC) that you'll be asking about would not function.
Although this is most likely true, there's a good deal additional to it than simply not blowing on your own up. He could not strike prairie dogs past about 150 yards, so I'm guessing that inconsistent combustion wasn't carrying out nearly anything favorable for his grouping means with those loads.
I have observed the precise reverse to get genuine in my gun. H4831SC was the slowest powder with a hundred and eighty g Accubonds. RL22 was a considerably quicker and Similarly exact powder in my three hundred Earn Mag.
It h4831sc also goes on to express that due to fshorter grains, that load density could be a little higher.
Run your load up with the precise powder (sc or typical) and lot that you are employing although. Exact burn off rate does not imply it's going to behave "accurately" the same. I've seen in excess of 100 fps difference between sc and mil-surp lots of H4831.
This is certainly an Intense extruded propellant and presents heightened insensitivity to cold and warm temperatures.
Many of the old Lyman data just stated IMR 4831, which was surplus army powder and now more recent mfg as H4831.
NBTs or Hornady VMax, but Have a very constrained h4831 vs h4831sc offer of Varget, and also a large amount more accessible H4831SC. I shoot 55 gr. loads Nearly exclusively, simply because which is exactly what the rifles shoot the most effective.