Graybeard wrote: "The difference in the various JDJ vs. JDJ #2 based on the two cases is generally listed as 100 fps by SSK with the bias in favor of the .30-30 based #2."
The small-caliber JDJ #2s (other than the 6mm JDJ #2) are actually based on the .307 case and not the 30-30. Most #2s are no longer recommended or offered by SSK as too many folks red-lined things and got into frame-stretching territory.
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There is no short case life associated with 30-30-based wildcats as long as the brass was formed correctly in the first place. My 7mm Bullberry is a perfect testament: I have one particular batch of brass that is now on its 24th or 25th firing (I'd have to pull the boxes to verify but it is at least 24). Cases have not been annealed, neck tension is excellent and the primer pockets are not an issue. And every load fired through this brass has been typical full-power hunting loads.
Right now, I have a batch of my 6.5 Bullberry IMP (aka 6.5x30-30 AI) brass on its 10th go-round with no associated problems, either.
But if you do not begin with new, squared-up brass and the cases are not fully formed on the first go-round and in a manner that fully supports the case (bullet to the lands and a compressed load), then all bets are off as I doubt you'll get more than 5-6 firings before you'll start losing cases to splits, etc.
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As to comparisons, there isn't enough difference between the .225-based and 30-30 based wildcats to make a nickel's worth of difference in the field.
I've had and used both quite a bit, and either would serve you well.