Spiris Posted April 18, 2009 Report Share Posted April 18, 2009 I have been wondering for a while about the actions and barrels used by companies who are now chambering the Win short magnums. With a case diameter of .555, how much thickness is left on the barrels? Are these actions and barrels the standard diameter, or are they a thicker design? I wonder if anybody here knows? The reason I ask is that I have a couple Remington barrels in 243 and at least one more Turk Mauser action in good shape and I have been considering assembling one of the 24" barrels and rechambering to 6mm/284 Win. I already have the reamer and headspace gauges and the Lee dies are on the way. The barrels are 1in9.125 twist. I know that most will say to leave it at 243, but does anyone think this is a bad idea? The case is .500 diameter and that's only .015 a side removed over standard. I'm also aware of the 6mm improved but as I said, I already have the 6MM/284 reamer. Another option is that I have a new A&B barrel blank in 1in10 twist and a M48 action in great shape that I could use for the conversion. Ya, I know the 6mm/284 can be a barrel burner, but with the newer slow burning powders and loading to 6MM Rem velocity levels, I'm sure it will last my lifetime. Let me know what you think. Spiris Link to comment Share on other sites More sharing options...
z1r Posted April 18, 2009 Report Share Posted April 18, 2009 Savage is at least one manufacturer that changed their actions JUST for the WSM. The thread OD is large to leave more meat over the chamber. Without saying if your idea is a good one or not ponder this: Modern rifles use mostly 16 tpi threads which are very shallow compared to the mauser's 12 tpi which are deeper. And, most of those others have shanks of 1.060" or larger compared to the SR mauser at 0.980". I don't think that even with the longest 6mm bullets you need the extra magazine space that the K.Kale action offers. Link to comment Share on other sites More sharing options...
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