06-20-2018, 08:11 PM
Just had the same problem of a short throat on a 20" BCA from Classic. The referred it to BCA and got an immediate email from them. I gave the measurements I made (2.231 max to the lands) and they sent a return slip. They were out of stock of that one so gave me the options of two. The original was the 20" nitrided/straight flute 5R but got a replacement sent(due in tomorrow) which is the 20" 5R 416R SS Straight Flute HBAR. I will measure it as soon as it arrives. My current 18" BCA 416R SS 5R goes out to 2.290 to the lands. I have a few rounds loaded out to 2.270(ELDM) in my ASC 10 rnd which takes it to a .020 jump, but have not tested any yet. I have to measure all of my mags to see which one is the longest. Kudos to BCA for the quick service.