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  1. L

    Good fast powder for 77gr SMK out of 10.5" AR?

    OP, You may loose a little accuracy with a TAC load over an IMR 8208 XBR for an LR load. But the difference will only be a few 0.1s MOA. 77GR. SMK OTM over 5.56MM NATO TAC loads will group very nicely out to as far as you want to stretch it. 5.56MM NATO TAC load group below was fired at...
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    Good fast powder for 77gr SMK out of 10.5" AR?

    The 77GR. SMK OTM based BHA MK 262 MOD 0/1 cartridge was designed to be a Hague compliant accurized 5.56MM round. In other words, the bullet can not expand so as to cause undue trauma on the battlefield. The U.S. did not sign the Hague Treaty but we abide by it under organized warfare...
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    Good fast powder for 77gr SMK out of 10.5" AR?

    OP, Just want to put the bug in your ear about the 77GR. TMK bullet's terminal performance at 5.56MM velocity. It kills hogs/whitetail VERY well even when fired from a little 10" M4 (exit wound on 175lb. razorback below). Since it is a longer bullet, I have to reduce the propellant charge a...
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    Good fast powder for 77gr SMK out of 10.5" AR?

    AFAIK, there is still no published 5.56MM NATO load data for IMR 8208 XBR. Damn shame. Several of us worked up the 77GR. SMK (not the longer 77GR. TMK) over IMR 8208 XBR in new #41 primed LC cases with COAL of 2.255" in 5.56MM NATO chamber barrels. We came to a consensus that 24.0 appeared to be...
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    Good fast powder for 77gr SMK out of 10.5" AR?

    We started developing our own 5.56MM pressure TAC loads well before any data was published. The load we settled on was only 0.1GR. off the published data when it was finally released. First and foremost, any MAX 5.56MM NATO pressure load (62,366 PSI) will wreck even new LC 5.56MM brass primer...
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    Good fast powder for 77gr SMK out of 10.5" AR?

    IMR 8208 XBR produces good MV with low ES/SD along with a very high level of thermal stability. It is the propellant I use for my best LR 5.56MM accuracy loads. SWA produced an outstanding 5.56MM pressure 77GR. SMK OTM load over 23.8GR. IMR 8208 XBR in new LC brass. A 5.56MM 77GR. SMK over...
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    Good fast powder for 77gr SMK out of 10.5" AR?

    My ever-present GP truck gun is a 10.0"/10.3"/10.5" M4 carbine with an M4 can attached. TAC at 5.56MM NATO pressure works very well under the 77GR. SMK in 10" class barrels. It is fast (2450 FPS from 10.3" MK18 w M4 can) and its accurate, on par with 77GR. SMK OTM based BHA MK 262 MOD 1 factory...
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    Suppressor on 16in AR

    I am now in my 60s. AR15/M16/M16A1 select fire Colts were only $280 plus tax stamp when I got out of college in the '70s. Been using a 10" 1x7 LWT M4 Colt barrel for years but also have used 10.3 Colt & 10.5" Noveske uppers. I like the way 10.0"/10.3"/10.5" barrels handle with a can on the end...
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    New Tipped Matchking "TMK" loads from BHA??

    Chris, You are absolutely correct that Sierra publishes a range of BCs for their bullets based on velocity. In the past, BHA has based the published MV of their 5.56MM cartridges on what is obtained from a 20" barrel. The published BC of .362 is right in line with the MV you would obtain in...
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    Douglas or Criterion from Compass Lake?

    No worries. I was hoping you got your hands on an exceptional "hummer" barrel. I have seen a few 5.56MM hummers: 20" Krieger, a 24" Krieger, and a DOD 18" Douglas SPR. They do exist. I have a 14.5" 1x7 SOCOM Colt barrel with a very long throat which pretty much qualifies as a hummer but only...
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    Douglas or Criterion from Compass Lake?

    Post it.
  12. L

    Douglas or Criterion from Compass Lake?

    OP, A few years back, I asked Frank White at CLE to turn an 18" full heavy/fluted 1x7.7 SS barrel to get the most out of the 77gr. SMK OTM based BHA MK 262 MOD 1 factory loading or similar 5.56MM NATO pressure 77gr. SMK handload. At that time, he said a rifle length gas system 18" Krieger...
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    FGMM 175gr. SMK Ammunition: 7.62X51mm VS 308 WIN

    This info may be useful to others trying to decide which Federal Gold Medal Match (FGMM) 175gr. SMK OTM load to use in their accurized M14 or other auto loading rifle: the 7.62X51mm loading or the 308 WIN loading. With the price of high quality factory ammunition being what it is, you want to...
  14. L

    Duplicating MK 262 Mod 1 Ammo

    I don't see it often but BHA has also loaded their MK 262 MOD 1 & AMU cartridge in LC brass. I would think that the LC brass used is also primed/crimped at LCAAP. Due to the current shortage of WCC & LC brass, Jeff Hoffman has stated that BHA was being forced into using more expensive but very...
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    Anyone ever get 'Meh' results with Black Hills 77gr OTM Mk262?

    Been using the BHA MK 262 MOD 0/1 load for about a decade now so have a working knowledge of it. The BHA 77gr. SMK Blue Box load is just .223 RELOADS. The BHA 5.56MM pressure MK 262 MOD 1 cartridge has been packaged in several different forms but always with new mil-spec brass: mil-spec MK 262...
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    Ballpark velocity on 10.5" SBR (55g/77g)

    A high quality 10.0"/10.3"/10.5" barrel firing ammunition it likes can be capable of fine accuracy at modest range.
  17. L

    Vietnam War M1A

    The standard M14 rifle appeals to every Vietnam vet I have met that qualified with one.
  18. L

    Ballpark velocity on 10.5" SBR (55g/77g)

    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...
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    MK262 clone 77Grain 5.56 load problems / updated OCW tests

    AFAIK, there is still no 5.56MM NATO pressure load data published for lMR 8208XBR propellant. Load development above published .223 SAAMI pressure should be worked up slowly with all due caution. With that said: One of the accuracy loads that has been circulating among shooters for several years...
  20. L

    F marked front sight?

    OP, Colt has many people, including myself, confused with the introduction of their new flat top AR15A4 20" rifle. It has been verified that some of the Colt AR15A4 rifles left the factory with the expected "F" marked FSB (Front Sight Base) while other Colt AR15A4 rifles left the factory...
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