That is real unusual and makes all the others a compromise. It delivers the desired velocity, case capacity, and doesn't waste a bit of it. In this specific application, you can see that Trail Boss is unique. In this day, I am using whatever is the best selection in this respect. One of the great bits of information within the QuickLoad calculations is a look at the efficiency of the various powders as expressed by a percent as to what is burnt (with the remainder being blown out the barrel). In rifles, I simply don't bother with any powders filling the case capacity with less than 90%. When selecting a powder for a load, one of several criteria I consider is "compression", my experience has taught me that more is better in producing tighter ES & SD with both pressure and velocity. The "compression" or filled case capacity is best explained with the following image (it is actually 96%).
For an application like this, there just is not another powder available in the US that provides a full case of powder at the desired velocity. That's correct, IMR Trail Boss is what I was talking about. 17 grains to 18 grains of Winchester 748 powder. So, while there is a stark contrast in bullet size between the two cartridges in the photo, thats not. 8.0-grains would provide a nice tight compression of about 93% for the 1100 FPS that would produce 26.7 KPSI and 100% of the powder burnt."įirst, I assume you meant "Trail Boss"? If so, would you explain the part about "nice tight compression of about 93%". To make Subsonic 7.62x39 I start with Winchester brass and Winchester large rifle primers. 300 Blackout cartridge with a 220gr subsonic FMJ bullet. Atomics Tactical Cycling Subsonic in 7.62×39 produces more energy and power than most. Bear Ammo 7.62x39mm 196 Grain Subsonic Full Metal Jacket 500 Round Case - 454.99 Brown Bear 7.62x39 Subsonic Ammunition (500-Round Case) Limited to Stock On Hand Brown Bear 7.
Take your time to dig deep into the 1,000 categories and if you get a chance, please let us know how we can improve your shopping experience.Mr surveyor wrote:Above you said, "TrainBoss would be King. Unsuppressed, it is as quiet as most 22 LR and has minimal felt recoil. Used Guns is truly an one-of-a-kind of shopping experience. This means their unique items are available beyond the four walls of their store. Merchants can offer you 100% of their inventory real-time 24/7. Best price, best delivery, and best communication is the heart of Bravo’s Platform. Merchants are supported with the Bravo Systems Platform, which enables stores to sell you items with the highest level of customer service in mind. Feel confident that your purchase will meet, and in most cases, exceed your expectations. We’re proud that only 1.75% of the items shipped are ever returned. Used Guns Merchants get the highest marks in delivery success. Each item has been submitted to local and national law enforcement agencies so you can purchase items ethically and safely. Cartridge 7.62x39mm Grain Weight 220 Grains Quantity 50 Round Muzzle Velocity 1050 Feet Per Second Muzzle Energy 538 Foot Pounds Bullet Style Jacketed. Used Guns is like eBay and Amazon’s used good marketplaces but our items come directly from licensed merchants from all over the United States. Used Guns is home to the internet’s best prices and value, the opportunity to negotiate with merchants with “Make Offer”, and a 100% money-back guarantee on all items except for “as-is”.