Yes, I know a short barreled rifle and speed don't belong in the same sentance. I'm wondering if anyone has speeds for a 10.5" 5.56 in either 55g (m193 or similar) or 77g SMKs. I'm hoping 500 yards on steel (on occasion) isn't too tough of proposition. It's really just a fun range toy, and I'm not looking for expansion/etc, just as a target plinker.
- Thread starter SRSDriver
- Start date
2100-2300 (62 grain) I believe... buddy has a 10" Noveske with an eotech that we could put rounds in the general area (with a few hits from time to time) out to 450-500m.
Nice piece of kit and very fun to run and gun with.
Nice piece of kit and very fun to run and gun with.
I'm pushing 75gr bullets at 2250fps with 23.5gr Varget and 55gr bullets at 2750fps with 26.0gr TAC out of a 10.5"bbl.
OP,
Here is MV data at 10 ft. from a 10" Colt 1x7 M4 LWT barrel with M4 can with several useful loads at approx. 80 degrees F. Mostly use M193 for practice, BHA MK 262 MOD 1 or 77gr. SMK handload for accuracy, and any of the 70gr. TSX loads for terminal performance. The 77gr. SMK loads yield best accuracy and the 70gr. TSX loads yield best terminal performance (both by very wide margins).
LC M193 55gr. FMJBT---------------------------------------------------: 2638 FPS
BHA MK 262 MOD 1 77gr. SMK OTM-----------------------------------: 2351 FPS
77gr. SMK over MAX listed 5.56MM NATO charge of TAC (handload): 2434 FPS
MK 318 MOD 0 62gr. SOST---------------------------------------------: 2496 FPS
SWA 5.56MM 70gr. TSX------------------------------------------------: 2456 FPS
5.56MM OPTIMIZED 70gr. Brown Tip----------------------------------: 2506 FPS
SSA 5.56MM 70gr. TSX-------------------------------------------------: 2575 FPS
70gr. TSX over MAX listed 5.56MM NATO charge of TAC (handload): 2543 FPS
Here are some recovered water-shot test bullets fired from 10ft. with 10" Colt: The MK 318 MOD 0 SOST fragmented quite nicely while the M193 yawed/flattened but did not frag. And the 70gr. TSX expanded to 0.48" across the petals while retaining 100% weight.
Here is MV data at 10 ft. from a 10" Colt 1x7 M4 LWT barrel with M4 can with several useful loads at approx. 80 degrees F. Mostly use M193 for practice, BHA MK 262 MOD 1 or 77gr. SMK handload for accuracy, and any of the 70gr. TSX loads for terminal performance. The 77gr. SMK loads yield best accuracy and the 70gr. TSX loads yield best terminal performance (both by very wide margins).
LC M193 55gr. FMJBT---------------------------------------------------: 2638 FPS
BHA MK 262 MOD 1 77gr. SMK OTM-----------------------------------: 2351 FPS
77gr. SMK over MAX listed 5.56MM NATO charge of TAC (handload): 2434 FPS
MK 318 MOD 0 62gr. SOST---------------------------------------------: 2496 FPS
SWA 5.56MM 70gr. TSX------------------------------------------------: 2456 FPS
5.56MM OPTIMIZED 70gr. Brown Tip----------------------------------: 2506 FPS
SSA 5.56MM 70gr. TSX-------------------------------------------------: 2575 FPS
70gr. TSX over MAX listed 5.56MM NATO charge of TAC (handload): 2543 FPS
Here are some recovered water-shot test bullets fired from 10ft. with 10" Colt: The MK 318 MOD 0 SOST fragmented quite nicely while the M193 yawed/flattened but did not frag. And the 70gr. TSX expanded to 0.48" across the petals while retaining 100% weight.
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Thanks for the details guys! This helps a lot!
A high quality 10.0"/10.3"/10.5" barrel firing ammunition it likes can be capable of fine accuracy at modest range.
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I see @ 2200 w/ 24.7 of TAC and a Nosler 77 out of an LMT 10.5". Eye boxes at 250 are consistent.
5.56 is a high pressure cartridge that needs a slow burning powder and a long barrel. the 300 BLK is the perfect SBR, it uses pistol powder and burns it all in the first 9 inches of the barrel, the military tested it with a 9 in barrel out to 460 yards, it has 17% more energy than the AK. same bolt/mags/etc, all you need is a barrel. Scroll down n watch the travis haley video, "a 300 blk year" he uses it out to like 800 yards! AND now that SIG got that arm "brace" approved by the ATF, (which you can fire from the shoulder with) its the ERA of the legal SBR!
SBR Caliber Showdown: 5.56/.223 vs. 300 BLK | The Truth About Guns
PS if you are going to use a short barrel in 5.56/.223 use the fastest powder listed IMR 4198/H4198
Hodgdon is only site with .223 pistol load data: click on pistol, then .223: Basic Manual Download
63gr
IMR 4198
.224"
2.235"
18.3gr
2,389
46,300 PSI
19.5gr
2,489
52,300 PSI
SBR Caliber Showdown: 5.56/.223 vs. 300 BLK | The Truth About Guns
PS if you are going to use a short barrel in 5.56/.223 use the fastest powder listed IMR 4198/H4198
Hodgdon is only site with .223 pistol load data: click on pistol, then .223: Basic Manual Download
63gr
IMR 4198
.224"
2.235"
18.3gr
2,389
46,300 PSI
19.5gr
2,489
52,300 PSI
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