Had my thin barreled 6.5-284 threaded by Thunderbeast recently. End of barrel comes in at .608 at the 23" mark. Had it zeroed with 156 EOL before I sent it to WY, but knew it may be off when the brake and suppressor were added. Just bolted it back into the stock, ran a couple patches down it, bolted scope on, screwed on the UL7 and tested it out. 1st shot landed just a bit left, then next 4 stacked in there on zero. Big fan of Thunderbeast suppressors and having them thread my muzzles at their shop.

[Linked Image from imagizer.imageshack.com]

Will take it out to 1000 soon to double check drops.