I've spent the last 8 months trying to acquire a .300 BLK SBR barrel. First I spent 6 months waiting on a Delta Company barrel. Then I switched to a CMMG and waited for 4 weeks, then it turned into 8 weeks and I cancelled after I found a *very* inexpensive .300 BLK 7.5" upper. It was so cheap that the complete upper was less than the barrels I was looking at. In my haste to get in while they were in stock I forgot to ask the twist. Turns out it's a 1:10 twist on a 7.5" stainless barrel. Well, I'm pretty sure that's going to cause me problems shooting suppressed 220gr rounds. Does anyone here have any real world experience with shooting 220gr through a 1:10 SBR .300 blk barrel? I know the couch monkeys are going to theorize, but I'm interested in real experience as I've seen some pretty huge variants in what will and wont stabilize compared to common knowledge.
From the .300 Whisper website:
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Magnum pistol powders such as H110 work well for subsonic loads. Sierra 240 grain (16 g) jacketed bullets work well if the barrel has a 1:8 twist. <span style="font-style: italic">Barrels with a 1:10 twist will stabilize 220 grain (14 g) bullets at subsonic speeds.</span> 125 grain (8 g) bullets will reach 2400 ft/s (730 m/s).</div></div>
And if it doesn't stabilize I'll throw it up for sale for someone who won't be shooting suppressed.
From the .300 Whisper website:
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Magnum pistol powders such as H110 work well for subsonic loads. Sierra 240 grain (16 g) jacketed bullets work well if the barrel has a 1:8 twist. <span style="font-style: italic">Barrels with a 1:10 twist will stabilize 220 grain (14 g) bullets at subsonic speeds.</span> 125 grain (8 g) bullets will reach 2400 ft/s (730 m/s).</div></div>
And if it doesn't stabilize I'll throw it up for sale for someone who won't be shooting suppressed.
