2/3/2024 0 Comments Subsonic 223 recipes![]() Then I checked each one in a Wilson case gauge. I bought set of Lee dies, and set about carefully reforming it. So I milled the brass down to 1.358 +- 0.001, deburred, and cleaned it. As I said, Barnes calls for 1.358 shell case length for their highly regarded 110GR Tac-TX. The SAAMI cartridge length specification calls for 1.368 +0.000 -0.020, so the lower limit would be 1.348. The brass was cut down from some once-fired PMS. I’m about at my wits end trying to figure this one out. I’ve used PCT go and no-go gauges to check headspace, as well as the Wilson case gauge, all of which checks out, and says everything SHOULD fit. all rounds seem to feed well, but fail to fully chamber and lock the bolt. A real booger to get out without breaking anything. I’ll get one or two round that feeds and chambers perfectly, and then get 4-5 that feed, but won’t chamber, and seize up hard in the chamber. Producing more failures to chamber, than not. I’ve been through two sets of dies, first the Lee dies, and the latest being the RCBS small base dies. I plan on using the Barnes 110GR Tac-TX, the Sierra 110 GR Varminter HP, the new Sierra 125 GR OTM FB Matchking, and the Sierra 220 GR Matchking for subsonic. I’ve also had major problems with failure to chamber, regardless of the bullet used or OAL.Ĭases were trimmed to 1.358, the middle of the tolerance, and that specified for the Barnes 110 GR Tac-TX, and at least one commercial re-formed case producer I’ve talked to. Pingback: Internet reloading recipes- a cautionary tale | kR-15: info and resources for firearms enthusiasts kR-15.Com neither assumes nor authorizes any person to assume for it any liability in connection with the use of any data. NOTE: Users assume all risk, responsibility and liability whatsoever for any and all injuries (including death), losses or damages to persons or property (including consequential damages), arising from the use of any data, whether or not occasioned by publisher’s negligence or based on strict liability or principles of indemnity or contribution. I run this load recipe on my Lee Precision 4-hole Turret Press and load both factory BLK brass and 5.56 brass trimmed to 300BLK specs. KB ALERT: Winchester or a similar, harder primer are the only safe ones to use in a Lee Progressive loader-be sure you use the correct type of primers with a Lee Progressive system. rI use CCI primers because they are a bit faster burning than Winchester and that’s handy for subsonic loads to help ensure you maximize ignition to help cycle the action. The bolt locks open after the last round clears.Īccurate 1680 is tough to find sometimes but the powder density matches the case capacity very nicely in the BLK. I’m using 220gr Sierra Match HPBT for the projectiles and AA1680 for powder. About 50 rounds of this recipe fired through my 16″ rifle at distances up to 200 yards to punch paper and plink. This is the recipe I use for supersonic loads for my Model 1 300 Blackout Carbine. The BLK was designed to run suppressed too- so if real quiet os your bag and you I enjoy some closer range shooting ( effective hunting range is about 100m). 5.56 ‘heavy’ projectiles weigh in at 75-80gr. That’s a mere 3.4 times heavier than common 62gr 5.56 ammo. The subsonic loads are intriguing: who wouldn’t want to send a 220gr Sierra HPBT for a big, heavy projectile to create high performance at subsonic fps. 338BR and the 510 W though.The BLK was designed to accommodate both supersonic and subsonic ammo without any tuning or performance headaches. 338LM, 6.5X47, 308 etc through cans and it works great. This is just my opinion based on quite a few years of playing with subsonics and suppressors. That way you can take care of any close in stuff quietly and save a lot of time on loading a basic 22LR equivalent in your rifle. I know some guys think they should have subs for any gun they carry with a can but it makes more sense to carry a suppressed. You've got a 300gr subsonic telephone pole coming out of the barrel and with good loading and workup with your rifle you can hit dogs out to 500yds with a heavy bullet and do it quietly. 338 BR upper on might make it worth doing. On the other hand taking your AR and putting a. You don't gain enough with the subs to make it worthwhile when you're limited to. I think more realistically you build a dedicated subsonic rifle and just shoot regular HV ammo out of your.
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