![]() Like I said, overall, a very well written treatise, easy and enjoyable to read and the author sounds like someone good to talk to at the camp after a day of hunting. The author notes the terminal stability factor, this is the wounding mechanism that this type of load relies upon as the bullets do not expand at these low velocities unless they are made to do so (several firms make special bullets for these applications, see lehigh bullets and Lutz Moeller's website) The tendency to overpenetrate can be an issue and the aforementioned bullet designs are intended to mitigate that. We have built a 6.5 twist 300-221 Fireball for a professional shooter who uses it at long distance, suppressed, with 240 gr SMK loads. Had he used an 8 twist barrel, he might have found less issues with stability and perhaps greater accuracy. The author used a 10 twist barrel for economic reasons. One of the key factors that the author mentions is stability. As I had discussed in my review of the Howa MINIACTION, I’ve been chasing the 7.62×39 white whale for years. 500 Whisper into the commander's hatch of a MBT at 900+ yards, using a hand gun. Often encountered in an AK or SKS type semiautomatic rifle, the 7.62×39 mm is also available in conventional bolt action offerings, the CZ 527, Ruger 77 (limited run) and Howa MINIACTION, to name a few. JD Jones did a demo at (IIRC) Aberdeen, where he was able to fire several rounds of. The practical limit of subsonic range seems to be about 200 yards.ĭedicated 45 and 50 cal subsonic rounds are used at 400-500 yards to engage mansized targets by a number of shooters, not all of whom are 8541s or similar. tool marks are a science all to themselves. other that it is perhaps more difficult but not untraceable. makes empty brass an untraceable entity.ĭon't think I need to expand on this. Yes, it is nitpicking, but I would have worded it more cautiously. To make a broad statement like that is risky. Also, the 338 x 39 has been built by more than one person and the 338-7BR is common enough that you can rent the reamer. Russians have done lost of work on this, note the 9 x 39 Grom. Plenty of research has been done, but just not that much published. It seems very few people have experimented with heavy weight, subsonic bullets fired from medium sized cartridges. But if you reduce the velocity to a subsonic 1100 fps, it produces only 150 foot-pounds. If you don't mind, what wouldn't you agree with? Thanks. At 3250 fps, it produces 1,280 foot-pounds of energy at the muzzle. Have you considered 30 HRT (30 cal on 6.8 SPC)? 30 Herrett Rimless. I got out of all such things in late 2019 and early (pre-Spring) 2020.One or two items that I am not sure I totally agree with, but overall a very well written treatise. My target average speed was 1050-1065 fps. For 300BLK I used cheap Federal cases (semi, so retrieval was not always guaranteed, so no expensive Lapua), CCI primers, H110 at 10 grains to start, with a 220 gr Sierra pointed or round nose bullet. Do you want a cartridge well suited to hunt bigger animals like kudu, eland, elk, moose, caribou, or red stag with during an Africa, Canada, or New Zealand. It was a case of modify the rifle, make reloads, re-tune rifle, re-do reloads, re-tune rifle and do final reloads. ![]() I have thought about 300 Whisper and 7.62x39. Lately Ive been looking into having some sort of 30 caliber suppressed rifle built for shooting subsonic rounds. Subsonic Line 7.62x39mm Rifle Ammo, 182Gr FMJ BT 20Rds Rangeview sports CANADA. Spending the time to tune the rifle for the subsonic was time consuming with no precise formula to follow I mean, there was a set of guidelines but they needed fined tuned for each rifle to achieve bolt hold open while still having the fastest round under 1100fps. 7.62x39 Subsonic Jump to Latest Follow 1 - 10 of 10 Posts Longshot38 Registered Joined 2,165 Posts Discussion Starter PPU Subsonic Line Ammo 7.62x39mm 182Gr - Ammo Rating Target Shooting. I've made subsonic ammo before for various cartridges but only for manual repeaters and never 762 so not much help there, sorry.I have done it for Armalite Rifle model 15 platform rifles in 300BLK and 7.62x39mm. This round is 1040 fps in a 16 barrel shooting suppressed. The ammunition is loaded using NEW Prvi brass, Hodgdon or Alliant powder, Winchester Large Rifle primers, and 180 grain Sierra SP Pro Hunter bullet (.311 diameter). ![]() The 762x39 has more case capacity but it could be a starting point. New Offering 7.62×39 SUBSONIC with a 180 grain Sierra SP bullet. 300 BLK subsonic will cycle an action but the gas system has to be correct.
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