I have now come into ownership of some Federal 38spl +P+ 148g hydra-shok "for law enforcement use only" ammo.
First question, how much ammo are we talking about? A box? three boxes? a case??? A semi trailer full?? (pipe dreams
)
Next question, are you certain it is Federal factory loaded ammunition, and not reloaded ammo in Federal cases and boxes? (had to ask)
I believe Federal is still in business, if you want to know what pressure the +p+ you have was loaded to, you might call them and ask....
Next, a few points to consider about SAAMI, pressure numbers, and our guns.
SAAMI standards are for INDUSTRY safety. They are set so what is made using their standards will be safe and function properly in 99%+ of the guns in use. Barring some defect in your gun SAAMI specs WILL BE SAFE.
But, the SAAMI limits are NOT safety boundary limits. They are not the limits at which things fail.
And, on that subject, PROOF loads are also
not the limit at which things fail. Our guns survive proof load testing without failing and without damage.
Once, anyway..
And this is what it comes down to, the maker's rating on guns for standard or +p is for
continuous use. Is your gun going to blow up shooting ammo hotter than it is rated for (but still below proof level pressure)? Not likely.
can you damage your gun, wear it out prematurely shooting ammo hotter than it is rated for? Absolutely. How much shooting will do that?
NO ONE KNOWS.
It depends on the combination of specifics, and no one can tell you, first because they don't know all the specific interactions between your gun and the ammo, (and neither do you or I) and second, even if they did, no one will state "your gun will fail at round #457.." THe most you might find is some test where "our test gun failed at round #457"..which means almost nothing if your gun and ammo isn't identical to their test gun and ammo.
So, we ALL "err on the side of caution" about these things. Its just prudent, to stay where we are confident of both safety AND proper function.
For one example, I have a Colt alloy frame snubnose .38. Its long out of production now but at the time it was being made, Colt said it was ok with +p ammo. But, Colt ALSO said to send them the gun after firing 1,000 rounds of +p, so they could check it, and to send it to them every 1,000 rnds there after.
DO I shoot +p from that gun? No. Would I use +p in that gun at need without worry? Yes. (because there is no way I'm ever going to get close to shooting 1,000 rnds of it)
What matter isn't that ammo from a reputable ammo company like Federal is going to blow up your gun, (its HIGHLY unlikely) what matters is, is it going to work properly in your gun and how soon any overstrain (if there is any) will result in a problem. Only shooting will give you any idea of that. And only enough shooting will answer the question for certain, but testing to destruction is something most of us would rather avoid.
Ammo CAN be within "specs" and still be too much for your gun. Again, its a matter of specific combinations. and the stars lining up "just right".
I have read of this happening and personally experienced it, as well. Tested a .357 load (yes a hot one) that was within published data, in 4 different guns, flawless in 3 of them, but in one, fired cases stuck in the cylinder and could not be removed by normal hand pressure alone. The ammo was within spec, it was "safe" but it was NOT SUITABLE for that one specific individual revolver. And that one specific revolver worked normally with all other ammo.
And this is the only thing I would be concerned about shooting the Fed +p+ ammo you have from your gun. Not that it would blow it up, or damage it, but would it fire and eject properly. Only a shooting test will tell you that.
Call Federal, see what, if anything they can tell you about the ammo. Shoot a cylinder full and see if it behaves normally, or not. If it does, then I'd say you're fine to use it, once in a while.
Just my opinion, and worth what you paid for it, or possibly, less...