![]() The owners BS about the special chrome is likely just that & his refusal to talk about it is likely because he simply doesn't know. 37 for a chrome lined barrel being pretty decent, IMO. Regardless on any shortcomings from the company, the results of the barrel are pretty impressive with an 80 shot composite group with a mean radius of. The set-up was very similar to that pictured below.Įxcellent write-up, as usual, Sir.thanks for posting it. ![]() Wind conditions on the shooting range were continuously monitored using a Wind Probe. Sighting was accomplished via a Leupold VARI-X III set at 25X magnification and adjusted to be parallax-free at 100 yards. As many of the significant variables as was practicable were controlled for.Īll shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) A fore-end adaptor attached to the free-float handguard rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. The shooting set-up will be described in detail below. Pictures of shot-groups are included for documentation. fliers, target movement, Butterfly Shots). There was absolutely no use of any Group Reduction Techniques (e.g. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There were no malfunctions of any kind during the break-in period nor during the accuracy evaluation. I conducted the accuracy (technically, precision) evaluation of the 16” BRT cold hammer forged Optimum barrel after performing a 200 round break-in of the rifle and then a thorough cleaning of the barrel and operating components. This bolt tail forms an exemplary gas seal with the bolt tail channel inside the bolt carrier (0.2514” on the Geissele carrier) contributing to the efficiency of the gas system. The diameter of the Geissle bolt tail is 0.2507”. The mil-spec for the bolt tail calls for a diameter of 0.2503” plus or minus 0.0002”. The diameter of the bolt tail fails to meet the US mil-spec, but in a good way. On a side note, the Geissele bolt carrier group has some interesting dimensions. I rounded out the upper receiver group with a BCM Mod 4B charging handle, a Forward Controls Design flash hider and a Geissele bolt carrier group. ![]() The Optimum barrel was free-floated in a Bravo Company 13” MCMR M-LOK handguard with a V Seven titanium barrel nut. This requires a thermal fitting with the barrel extension and creates such a tight fit that it’s not possible to pull the components apart by hand and eliminates any play between the barrel extension and upper receiver. For those of you who might not be familiar with the BCM upper receivers, they are intentionally made under-sized in the section of the bore that accepts the barrel extension. I installed the BRT Optimum barrel in a Bravo Company upper receiver. I’ve found the A5H1 to be more suitable for shooting with a mix of 5.56mm loads and quality 223 Remington loads The diameter of the gas port on this 16” Optimum barrel gauged at 0.081”.īRT recommends using the A5H0 buffer for shooting unsuppressed with this barrel. Relating to Residence Life & Housing at Jefferson Community College.BRT refuses to provide prospective customers with the diameters of the gas ports on the CHF Optimum barrels so that they might make informed purchasing decisions. The College website contains the most up-to-date policies, procedures and regulations If you need older versions of the College Catalog please email. Procedures and regulations however a printable version of JCC’s 2021-2022 College Catalog (publication effective date of August 2021) is also available. ![]() The College website and online catalog contain the most up-to-date programs, policies, The Black RiverĪward winning entries from the annual NCWF writing contest. Jefferson Community College students, faculty, staff, and alumni. The Black River Review is a journal of poetry, prose, and fine arts contributed by For a paper copy of the report, contact the Vice Presidentįor Administration and Finance or the Vice President for Students at 88.Ī comprehensive listing of community and campus resources for veterans of the Armed The annual security report contains crime statistics, safety facts, and informationĪbout safety programs. Foundation Toggle Foundation Child Items.Student Life Toggle Student Life Child Items.Costs & Aid Toggle Costs & Aid Child Items.Admissions Toggle Admissions Child Items.
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