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Old February 17, 2012, 10:27 PM   #12
old roper
Senior Member
Join Date: June 11, 2007
Posts: 1,146
One of the problems with the 223WSSM it need a chrome lined barrel. If you look at the loading data for the 223WSSM it's using 45gr of powder and has H20 capacity of 53gr. You could build a 22-250AI use less powder(5gr-7gr) maybe be 100fps less and 200fps less with the 22-250 using (5gr-8gr) less powder.

Same thing with the 243WSSM/243 both have the appr same capacity H20 54gr and if you look at the Nolser data the 243WSM has appr 100fps advantage but the 243WSSM has a higher PSI spec 65K vs 60K for the 243.

Plus/Minus with everythng
Semper Fi
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