September 13th, 2017

The CMP Western Games and Creedmoor Cup in October

CMP Western Games Creedmoor Cup Vintage Rifle sniper

The 14th annual CMP Western Games and Creedmoor Cup Matches will head back to the Ben Avery Shooting Facility in Phoenix, Arizona next month. The CMP Western Games run October 13-17, 2017, followed by the Creedmoor Cup Matches from October 18-22, 2017. Popular CMP Western Games events will include the Garand, Springfield, Vintage Military, Modern Military, Rimfire Sporter, Carbine and Vintage Sniper matches. The Creedmoor Cup features a 4-Man Team Match, EIC Match and 80-Shot High Power rifle event. The 10-day combined series of vintage and service rifle matches are open to competitors of all ages and experience levels.

CMP Games Creedmoor Cup Ben Avery

Western CMP Games Entry Form | Western CMP Games Online Registration
Western CMP Games & Creedmoor Cup Program | Directions to Ben Avery Range

Western CMP Games Matches

  • Garand & Springfield Match Clinic
  • John C. Garand Match
  • Springfield Match
  • Vintage Military Rifle Match
  • Small Arms Firing School/M16 Match
  • Rimfire Sporter Match
  • Carbine Match
  • Vintage Sniper Match
  • Modern Military Rifle Match
  • Western Creedmoor Cup Events

  • High Power Rifle Clinic
  • Creedmoor Cup (2400 point aggregate)
  • 4-Man Team Match
  • Creedmoor EIC Match
  • High Power Shooting Clinic and SAFS
    A CMP Advanced High Power Shooting Clinic will also be held with instructino from some of the nation’s leading High Power Shooter. In addition, a rifle Small Arms Firing School will give participants insight into the fundamentals of marksmanship and competition shooting. Participants are teamed up with experienced CMP Rifle Master Instructors for classroom and hands-on training, with rifles and ammunition provided. Students in the school will also fire in a true M16 EIC Match, observed by instructors on the line.

    CMP Western Games Creedmoor Cup Vintage Rifle sniper

    Try Out CMP’s Traveling Electronic Targets
    Competitors at this year’s CMP matches at Ben Avery will also have the opportunity to fire on the CMP’s highpower electronic target system.

    CMP Western Games Targets Electronic

    The traveling targets, which include precision scoring hardware and software, plus a high-tech wireless monitor system, were used earlier this year with great success at the Oklahoma Games in April and Eastern Games in May. In June, at the outset of the National Matches, the targets made history by recording 36,000 shots during an entire week of successful National Match Course events on the ranges of Camp Perry in Ohio.

    CMP Western Games Targets Electronic

    Permalink Competition, News No Comments »
    September 13th, 2017

    How Velocity Changes with Barrel Length — .223 Rem Test Results

    .223 Rem Cut-Down Test barrel UMC m855

    Most of us own a .223 Rem rifle. Now, thanks to our friends at Rifleshooter.com we can assess exactly how velocity changes with barrel length for this popular cartridge.

    Rifleshooter.com performed an interesting test, cutting the barrel of a .223 Rem rifle from 26″ all the way down to 16.5″. The cuts were made in one-inch intervals with a rotary saw. At each cut length, velocity was measured with a Magnetospeed chronograph. To make the test even more interesting, four different types of .223 Rem/5.56 ammo were chron’d at each barrel length.

    READ RifleShooter.com 5.56/.223 Barrel Cut-Down Test Article.

    Test Barrel Lost 25.34 FPS Per Inch (.223 Rem Chambering)
    How much velocity do you think was lost, on average, for each 1″ reduction in barrel length? The answer may surprise you. The average speed loss of the four types of .223/5.56 ammo, with a 9.5″ shortening of barrel length, was 240.75 fps total (from start to finish). That works out to an average loss of 25.34 fps per inch. (See inch-by-inch data HERE.)

    5.56/.223 Barrel Cut-Down Speed Test 26″ to 16.5″ Start FPS at 26″ End FPS at 16.5″ Total Loss Average Loss Per Inch
    UMC .223 55gr 3182* 2968 214 22.5 FPS
    Federal M193 55gr 3431 3187 244 25.7 FPS
    Win m855 62gr 3280 2992 288 30.3 FPS
    Blk Hills .223 68gr 2849 2632 217 22.8 FPS

    *There may have been an error. The 25″ velocity was higher at 3221 fps.

    Rifleshooter.com observed: “Cutting the barrel from 26″ to 16.5″ resulted in a velocity reduction of 214 ft/sec with the UMC 223 55-grain cartridge, 244 ft/sec with the Federal M-193 cartridge, 288 ft/sec with the Winchester M855 cartridge and 217 ft/sec with the Back Hills 223 68-grain match cartridge.”

    How the Test Was Done
    The testers described their procedure as follows: “Ballistic data was gathered using a Magnetospeed barrel-mounted ballistic chronograph. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. Average velocity and standard deviation were logged for each round. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. The barrel was cut off using a cold saw. The test protocol was repeated for the next length. Temperature was 45.7° F.”

    CLICK HERE to Read the Rifleshooter.com Test. This includes detailed charts with inch-by-inch velocity numbers.

    Much Different Results with 6mmBR and a Longer Barrel
    The results from Rifleshooter.com’s .223/5.56 test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. When we cut our 6mmBR barrel down from 33″ to 28″ we only lost about 8 FPS per inch. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was longer than Rifleshooter.com’s .223 Rem start length. Velocity loss may be more extreme with shorter barrel lengths.

    Permalink Gunsmithing, Reloading 3 Comments »