Via email from Rolf:
I know that several boomershooters use the 6.5 Grendel. I was having problems, and suspect a rough chamber might be the culprit. (Still awaiting a reply from Midway, where I bought the upper, as it’s a MidwayUSA house brand, before I do anything like home gunsmithing). I went looking for a chamber hone that would be right, and could not find one, and saw contradictory info on the web. So I emailed the company (Brush Research) that makes the Flex-Hone chamber hones to ask what the correct one might be. I got this prompt reply this morning. I’m pretty sure that they’d be OK with posting the info on a popular shooting-related web-site such as yours, if you want to post it for any of the Grendel shooters out there who might want to know.
From: Technical <technical@brushresearch.com>
Sent: Monday, July 13, 2020 9:21 AM
Subject: Re: [#479759] New Technical Inquiry HomeHi Rolf,
Thank you for contacting us regarding chamber hones for your 6.5mm Grendel. We have made these for the Grendel before only they aren’t visible on our website or literature.You’ll want to order part ID 12809 for 400 grit SC abrasive or part ID 12810 for 800 grit SC abrasive. The following distributors can order this for you in Washington state. Simply contact them and ask them to order up the part ID’s provided:
APPLIED INDUSTRIAL TECH
4021 6TH AVE S.
SEATTLE WA 98108
(206) 223-5255FASTENAL
9320 15TH AVE SOUTH
SEATTLE WA 98108
(206) 762-0297Let me know if you have any other questions we can assist with.
Regards,
Brush Research Manufacturing Co., Inc.
4642 Floral Drive, Los Angeles, CA 90022
Phone: (323) 261-2193 ext 703
Fax: (323) 268-6587