Originally Posted by Dirtfarmer
Originally Posted by 19Scott63
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Here is a visual comparison of some of the "Big 7s" with the 26Nosler. This information was garnered from Ammoguide.com. They are arranged by H20 capacity posted by Ammoguide.
7mm Rum - 106.6gr.
26Nosler - 96.4 with a 6.5 neck. A 7mm neck would add a few gr.
7mm STW - 92.7gr.
7mm Dakota- 90.7gr.
7mm Mash - 84.9gr.
7LRM - 84.8gr.
The 7Dakota should be after the STW - my mistake

It looks to me like the Nosler case is the largest that will fit in a 3.6" action with available, quality brass. I'm planning on using a RUM action and throat the barrel long for the 7mm heavy bullets. I'm thinking that the "useable" case capacity will be close to the RUM's. Something like a larger 7LRM. I'm also thinking of a 338x26Nosler on M70 3.6 CRF action.
All information was off the "Internet" so take it for what that's worth although I've found Ammoguide to be pretty reliable.
SCP


26 is the largest that will fit a 3.4" action, the RUM and STW work in a full mag 3.6" action. But, if I built a 26 or 28 Nolser, I'd use a RUM action to allow full freedom with the longer bullets.

I've found it frustrating, trying to get gr. of water case capacities for the big 7's. Some are with bullet in place, some are to the brim. The difference can become confusing. For example, I got 93 gr. H2O on line for the 26 Nosler, JB measured 90 by inserting a bullet in the case. I see your number of 96.4. Nosler posts 93, so even though they're all in the ball park, who knows how the others were measured.

DF

Thanks for the corrections DF - Thats what I meant to say.