02-13-2014, 03:31 AM
I today E-mailed the following to Brownells Customer Service, Attn: Technical Support (Gun Tech):
"RE: 080-001-026WB,18" 6.5 Grendel Med Mid Gas Barrel Stainless Steel 1-8" Twist, @ $289.99.
"I just returned to a competitor, for a Refund, an AR-Stoner Barrel and Bolt AR-15 6.5 Grendel Medium M4 Contour 1 in 8" Twist 16" Stainless Steel.
"The problem: though the Bolt had the proper (for the 6.5 Grendel) 0.135" Bolt face depth, and the spring-loaded Bolt Carrier Group chambered Hornady factory-loaded 123-grain A-MAX ammunition (COL, 2.245"), unloading unfired cartridges from the chamber was not without some resistance, and the bullets exhibited pronounced abrasions approx. 0.075" - 0.080" forward of the case neck, at five points around the circumference (5R rifling), and fired cases exhibited primer cratering --- an indicator of excessive pressure. Unfortunately, mine is not an isolated case, the topic warranting extensive discussion on the 6.5 Grendel Forum.
"Clicking the "Q&A" following the "Details" of your offering clarifies that your Barrel comes with matching Bolt and that the chamber meets SAAMI Specifications. Question: Has the barrel supplier, or Brownells checked to confirm that chambering a factory-loaded cartridge will not jam the bullet into the rifling lands (with telltale abrasions) of the 6.5 Grendel Barrels presently offered? If so, I may consider ordering the above-referenced item. A definitive response is appreciated. Thank you.
"CC: The 6.5 Grendel Forum"
"RE: 080-001-026WB,18" 6.5 Grendel Med Mid Gas Barrel Stainless Steel 1-8" Twist, @ $289.99.
"I just returned to a competitor, for a Refund, an AR-Stoner Barrel and Bolt AR-15 6.5 Grendel Medium M4 Contour 1 in 8" Twist 16" Stainless Steel.
"The problem: though the Bolt had the proper (for the 6.5 Grendel) 0.135" Bolt face depth, and the spring-loaded Bolt Carrier Group chambered Hornady factory-loaded 123-grain A-MAX ammunition (COL, 2.245"), unloading unfired cartridges from the chamber was not without some resistance, and the bullets exhibited pronounced abrasions approx. 0.075" - 0.080" forward of the case neck, at five points around the circumference (5R rifling), and fired cases exhibited primer cratering --- an indicator of excessive pressure. Unfortunately, mine is not an isolated case, the topic warranting extensive discussion on the 6.5 Grendel Forum.
"Clicking the "Q&A" following the "Details" of your offering clarifies that your Barrel comes with matching Bolt and that the chamber meets SAAMI Specifications. Question: Has the barrel supplier, or Brownells checked to confirm that chambering a factory-loaded cartridge will not jam the bullet into the rifling lands (with telltale abrasions) of the 6.5 Grendel Barrels presently offered? If so, I may consider ordering the above-referenced item. A definitive response is appreciated. Thank you.
"CC: The 6.5 Grendel Forum"