I think your velocity numbers are wonky... 3100 plus for m855 and 3200 for .223. thats the hottest i have ever seen in both of those loads. i usually see 3000 at best for .223. either lake city loads their 223 super super super hot or something else is wrong. m855 usually gets around 3050 from 20 inch from everything i have tested. Also im not sure how a 55gr bullett has more energy in .223 vs 556 even when the 556 is going faster in your add up slide. maybe im missing something.
I've verified the m855 numbers as consistent across several sources, but as Paul Harrel always says "Not all chronographs agree with eachother and certain environmental factors such as ambient temperature and elevation can affect chronograph results." The .223 numbers do seem a bit high though, but they're the numbers I got. This could be a particularly hot loaded batch for whatever reason. Also in the 20" barrel slide, I accidentally switched the energy numbers for M855 and .223, although I say the right numbers. Thanks for your comment and for catching that mistake.
@@8mmmauserman Have you been able to chrono those again by chance? i picked up 300rds of that m855 so id be thrilled if its actually getting those numbers. I was getting 1.5" groups out of my cheap scoped delton 20".... if its 3100fps thats amazing. True m855 velocity not some watered down crap. Love the channel, keep it up
Winchester m193 is loaded hot. Usually 2700fps from a 10.5” barrel, 3000 fps from a 14.5” , 3150 fps from a 16” barrel, and 3250 fps from a 20” +\- like 30-40fps from what I’ve seen. Variable dependent.
🇦🇺😎👍Good morning Big John. It’s always a pleasure to watch your videos as nobody can do them like you . Down here PPU 223 is up to 95 cents per shot at a cheap shop with no other cheaper options. Everything is up 40-50% since the scamdemic. Doesn’t look good in the ammo department. Have a nice day and keep your powder dry😎👍
Great video as usual. IDK if it was the design intention to be more accurate, but most ‘experts’ feel the 855 steel core can make it LESS accurate, if it is not perfectly weighted and centered in the lead. Troops also complained about it “ice-picking.”
Most people don't understand 5.56X45 is a cartridge. The 5.56 NATO is the SS109 loading of the 5.56X45 cartridge. Just like the M193 is a loading of the 5.56X45 cartridge. For all intents & purposes, SS109 & M855 are identical loadings. So, it's truly confounding why ammo companies will list 5.56 NATO M193. 🤠
The grooved area around the projectiles is called a cannelure. I have a 20" A4 and 800 rounds of M-855. I'm good to go. I wouldn't mind having a Dissipator of some sort either.
I think accuracy with different ammo varies wildly with barrel. I have a 16" faxing pencil barrel that will group 1moa with 5 shots of m193 but shoots closer to 2 moa with 855. However for combat accuracy I have seen it argued that even if it's base accuracy is inferior the better ballistic coefficient of 855 makes it more forgiving for unknown distance shooting and can lead to more hits in the field. I still prefer m193 for it's terminal performance though.
With accuracy, the group size may have been affected by down range wind. M855 being lower velocity and higher weight is less affected by things like wind drift
Most of the channels that have accuracy tested Winchester's current M855 have found it to be extremely accurate. Perhaps they invested in new equipment to make the projectiles when they took over the Lake City contract. My entire career in the military, the M855 never grouped as well as M193. But now? Looks like it's better. 🤠
14:51 did u accidentally switch the M855 energy fps on the 20in barrel with the 223? because if my math is right the M855 would be the 1348 foot pounds. anyway good video brother the 16in barrel is the reason i was here to watch anyway and that's some good information much appreciated
Ok, my apologies, I posted before the end of your video…it just sounded at first like you felt the 855 was more accurate, but you explained the issue with the steel core later.
