45-70 chamber pressure, which are pretty low. Coffee increased 11.35 USd/Lbs or 6.78 since the beginning of 2023, according to trading on a contract for difference (CFD) that tracks the benchmark. The factory powder is likely chosen to be compatible with the SAAMI specs for. But it's very accurate so I don't worry too much about it.Īlso, each powder has a different minimum threshold (pressure-wise) where it starts to burn completely. 458 and it's just on the verge of not burning completely, which is leaving a surprising amount of crud in the barrel. This isn't all bad, you do get the benefits of more velocity at less pressure (till you run out of room in the case). Also the farther down the barrel the bullet is before peak pressure is achieved. The slower the powder, the more time before the pressure builds to seal the chamber with the case mouth. If you can shake the case and hear powder move, that's almost certainly true. The factory loads are probably using a faster-burning powder, and less of it. Speed doesn't necessarily equal pressure. Yup, can't swing a dead cat around here without hitting someone named Mike I'll probably pick up a pound of Benchmark in the next couple of weeks and do some comparisons with Varget. My thoughts were to switch to the CCI primer and go up a grain in powder and see how the loads compare. If I want more pressure I want it to come from my powder, not my primer. There was a significant difference in velocity and pressure with the Winchester primer as compared to the others. I saw an article in a recent Handloader Magzine that held all things equal in a load except the primer. I have been using the Winchester LRM primer but might switch to the CCI 250. The max listed for Varget is 60.0C grains, just like Benchmark. With Varget, I get a mildly compressed load at 58.0 grains. I really like the idea of a compressed load for this cartridge. I found this information in the Hodgdon manual for Benchmark and the 45-70 (they list a Benchmark load for a 350 grain Hornady JRN bullet 56.0 - 60.0C, for a 405 grain Speer JFP bullet they list 55.0 - 58.5C). Use all the cautions you were stated when working up a load. That's the advertised difference in velocity between the two powders.īigBrass - Is Benchmark as dirty as Varget? You might want to look at Hodgdon data for some reference loads for the 45-70. With these chubby bullets 100 fps is a noticible difference. I like Varget, my only complaint is it's a little dirty and leaves a lot of residue. The Varget and 75gr HornadyĬombos just kept disappointing me for years and can't wait to try a few 23.4gr 8208/77gr SMKs.Jeffro - Tht's exactly why I want to know about Benchmark, I want to buy an 8 pound keg. This stuff will be lighting those 77gr SMKs this spring and 8208 has been putting smiles on my face with many. Had/having great success with IMR8208XBR. 223Rem heavies but not very good results with Hornady heavies and, again, waiting for spring to try some 77gr SMK. 23.5gr Alliant Reloader 10X also cloverleafs, but RL-7 2 grains more efficient.ĪeroE has an accuracy load that has been tried by many (including myself) and rifle after rifle just shreds one hole with 27gr Alliant Reloader 15 under a Sierra 52gr match HP. Personally had really great success with 55gr FMJ and 21.5gr Alliant Reloader 7. New powder availability and other supplies being so readily available and relatively cheap has me so "chompin at the bit" for spring. 223Remington is a very accurate cartridge from the git-go so powder, primer and brass choices along with level(s) of cartridge prep devoted is insanely fun for me personally. Love reading other's recipes, can't wait to get settled into my new place this spring and first time ever home with enough room and area with no nearby neighbors to actually shoot in my very own back-yard Grains per pound of powder 453.592 grams 1 gram 15.432 grains Grains per pound of powder x 1 gram of grains 6999.
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