I have a 7mm08 that I had Grant at True-Flite ream to .284 and shorten to 16"s, shoot very well 162gn at 2750fps and 140gnABonds at 2900fps both loads are at max with RL17. Could find another powder to come close and primer selection was also important, the 162gn load preferred CCI primers less pressure the 140gnABs didn't make much difference. Grant also sold us a old 6.5x55 Tikka barrel he wanted to get rid of, reamed to 6.5x284 16" barrel, this is starting to be my favorite combo 140gn A-max at 2750fps 130gnABs at 2800fps. All my loads were from Greg Duleys writeup he did in NZHUNTER.
Shot it at 600yds a couple of weeks ago on steel managed 5 shot 4" group - rapped(haven't shot the .284 since load development as still waiting for shipment of the 162gnA-maxs). Shot my first deer with this combo last weekend.
I have a DPT suppressor fitted to both barrels, after about 200rnds the first baffle is starting to erode quite badly the others looking like new. A new baffle to replace is only $45 to me not a issue really when you have such a light compact and accurate rifle. My next step is to maybe flute the barrel and bolt.
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