barnesuser28
Well-Known Member
Which of the wsm family of cartridges has the most case capacity?
Case capacity
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elkaholic
Well-Known Member
The body is longer on the 7 WSM.......Rich
Mikecr
Well-Known Member
Minus the necks, the 7WSM is 1gr higher than the 300WSM.
Including the necks they match, both ~1gr over the 270WSM.
Differences from reamer to reamer would separate them more than design.
Including the necks they match, both ~1gr over the 270WSM.
Differences from reamer to reamer would separate them more than design.
JeffVN
Well-Known Member
Interessting I was under the impression that the 7WSM had the highest case capacity of the three.
Jeffvn
Jeffvn
elkaholic
Well-Known Member
The 7mm does have the highest USEABLE capacity. The reason the 300 equals it is because a .308" diameter neck obviously holds more than a .284" neck. That is why when I'm building a wildcat, I always consider where the base of the bullet is going to be and what is an adequate neck length. A good example of this shows up in the amount of freebore in a given chamber. All things equal more freebore equals less pressure with a given load which equals less velocity; however, loaded to equal pressure "MORE" velocity is possible because of the increase in volume (capacity) due to the distance before the bullet contacts the lands......Rich
