![]() ![]() Reducing powder loading too far can result in an ugly condition where the powder in the case doesn't burn in the correct way, and you have an explosion known as a flashover. At that load it's either subsonic or it's not. ![]() I think that going below 60% of the original max load is unwise for this powder. Would help to know what your intended purpose is before sharing any load data. Just be aware that you'll have to buy a flaring die - and I've not been able to seat them without significant deformation of the noses. They're soft lead which is easier to drive down the barrel (more fps per grain of powder) which is handy if case capacity might otherwise be a limiting factor with similarly weighted jacketed bullets. Those would be worth investigating if you need projectiles to expand (the Speers are tough and would pencil through anything). I've also tried the cast bullets made by shooternz. Turns out it's an excellent powder for subs too, especially in cases where you don't have enough capacity to get your desired bullet up to ~1050fps with a suitable amount of Trail Boss. The burn rate of the powder is faster than AR2205 and it's much easier to ignite, being a flake powder that's better suited for shotguns than rifles. ~1800fps with a 123gr, gently coughing out spent cases in perfect condition. Later experiment with a different x39 rifle, I tried AP100 to make a reduced load that would just barely cycle the action. I stopped messing around with subs in that rifle at this point. The odd bit of unburned powder indicated I wasn't getting proper ignition too. I tried AR2205 and velocity was much more consistent - accuracy was even quite "good" - but with the slower burning powder, it was noticeably louder, and cases came out very dirty, indicating chamber pressure was so low that case necks weren't sealing. It could have been my shitty loading practices (I was relatively new to it, at the time). With 150's and Trail Boss, velocity was quite erratic, and the average was quite low. The 180's wouldn't stabilise in my rifle - so I'd recommend checking your twist rate and using the JBM stability calculator before buying anything that long/heavy. With high-quality cartridge cases and primers, Subsonic Ammunition offers the performance and accuracy shooters have come to expect from Hornady.Picked up a box of 150gr and 180gr Speer. Unique powders optimized for subsonic use result in a low flash signature, ideal for either suppressed or unsuppressed performance. Hornady® Subsonic Ammunition doesn’t have the loud report of a supersonic round, and paired with a suppressor, it’s even quieter. The XTP® bullet in Subsonic Handgun has built a world-class reputation for accuracy and stopping power. Performance of 300 Blackout Subsonic meets or exceeds FBI Protocol terminal ballistic test requirements. Powders are selected for optimal performance and consistency from lot to lot. Long grooves in its gilding metal jacket combine with the bullet’s flat profile and the patented Flex Tip® insert within its hollowpoint cavity to help it expand reliably at low velocities. The Sub-X bullet used in Subsonic Rifle features a lead core. Subsonic Handgun utilizes tried-and-true XTP® bullets that expand reliably at subsonic velocities. Hornady® Subsonic Ammunition - designed for accuracy and performance below the speed of sound - now comes in both rifle and handgun loads. ![]()
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