Quarterbore's Forums - Okay, let me straighten out something about .300 Whisper

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- - Okay, let me straighten out something about .300 Whisper (http://www.quarterbore.net/forums/showthread.php?t=5562)

Quote:

Originally Posted by mstarling (Post 30954)

rsilvers takes the position that a carbine length gas system can be used for both subs and supers . What he doesn't tell you is that while this is true ... it is true for a very, very small selection of powders ... like AA1680.

The down side of a pistol length gas system with a three position gas block is that it is not safe to shoot a supersonic round with the gas system set on the subsonic position.

So ... take your choice ... lots of flexibility with loads but very good function with the three position gas block at the price of being VERY careful not to screw up versus limited flexibility in powder choice with the carbine position gas system.

I personally have a Paladin barrel and pistol length 3 position gas system. Was bought before the 300 BLK was introduced ... but I would still choose to do it that way because it works VERY well.

Well thought out response (insert little smiley face applauding here ).

Quote:

I personally have a Paladin barrel and pistol length 3 position gas system. Was bought before the 300 BLK was introduced

same here:uzi2:

I have a M1S upper with carbine gas. As mentioned above, I have to use AA-1680 to get the subsonics to cycle. But once I switched to 1680 I was able to work up a load for subsonics that uses the relatively cheap Hornady 150gr FMJ, in addition to my loads with 220gr bullets. It also cycles supersonic just fine.

I decided to find a lod for my set up, rather than add an adjustable block. But if I was ordering just a barrel, not an upper, I would probably have gone with pistol gas and an adjustable gas block.