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Marlinman 10-17-2011 07:44 PM

105 gr 6mm bullet in a 243 casing
Has anyone tried this? They miked out the same. Im shooting a mossberg 800b. They are loaded to federal power shok specs. I have 5 loaded right now. They chamber good. I have always heard that except for the brass the 6mm will shoot through a 243 w/o any problems, is this true? Any and all thoughts are appreciated.

Marlinman 10-17-2011 07:54 PM

1st pic is the rifle and the 2nd pic is the finishd round

Attachment 33932

Attachment 33933

JTJ 10-17-2011 08:30 PM

The .243 is a 6mm. If the bullet mics properly then you can shoot it with the proper load.

Boyerracing343 10-17-2011 09:36 PM

Both of my loading manuals (Hornady and Speer) state 6mm and 243 winchester use a .243 diameter bullet.

robocop10mm 10-17-2011 09:50 PM

They use the same bullet. A 105 is about the heaviest you can put through either. I generally load a 100 in the .243.

Marlinman 10-17-2011 10:24 PM

That wat my book says also but i want to make sure b4 i shoot them. I also found at the yard sale i got the 105s at some 115 grain hornady hp 6 mm bullets unloaded

BlueTurf 10-17-2011 10:58 PM

I shot the Speer 105-grain SP in my Remington 788 .243 for many years with no problems. They actually grouped very well. Load data for the 105-grain bullet is listed in the Speer manual. Hornady also list data for their 105-grain A-Max for .243.

Marlinman 10-17-2011 11:03 PM

Im going 2 use them for deer this year. Thanks for the info guys, now back 2 making test loads

Marlinman 10-18-2011 06:30 PM

My next question is how will the 1 in 10 riflings handle the longer bullets of the 6 mm?

BlueTurf 10-19-2011 01:13 PM

Marlinman, that is an interesting question. Hornady recommends that their 105-grain matchy bullets only be shot through match barrels that can provide proper stability for accuracy. Their 105-grain bullet is pretty long.

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