+P Ammo

T

Tunaguy

New member
Is it safe to use 38 Special +P ammo in my S&W 66-3? Are the pressures of this load comparable to the 357? Where would one look to find out out if their pistol/revolver will accept +P ammo?
Thanks-Tunaguy
 
While +P ammo will not damage your S&W it doesn't really offer a significant increase in performance. But if you want to do it go right ahead.
 
Maybe I am wrong, but I think the 66-3 is .357 magnum. If so, then it's a moot point. It will certainly shoot +P, or .357 mag.

In any case, as said above, it's OK for +P.
 
SAAMI max pressure for .38 Special +P is 20,000 psi. SAAMI max pressure for .357 Magnum is 35,000 psi. Since the 66 is built for the .357 Magnum, .38 +P will present no problems for it pressure-wise.
 
The 66, while built for 357, was also built on a K frame and NOT intended to be shoot with 357 on a regular basis. It was designed, like the 19 in blue, to be shot with 38's and have LEOs carry 357 for duty use. Too much, especially hot, can result in frame issues, forcing cone issues, and you wind up with a gun needing repairs.

+P, while not as hot as 357, should be fine - watch your forcing cone and top strap if you're loading them very "warm". I have a 66-2, and I do not abuse it with 357's as they have a tendency to bind the cylinder after prolonged use. +P do not create that issue
 
The 66, while built for 357, was also built on a K frame and NOT intended to be shoot with 357 on a regular basis.
Click to expand...

Good point. BTW, I have been using yet another option for .357 mag. Gold Dot has a new 135g short barrel that is a down loaded .357 mag. It just barely comes in hotter than +P stuff. That would be a good compromise.
 
You must log in or register to reply here.
Back
Top