swsig;

If you look at the fps in todays Federal +P+ 115gr JHP ....
it is no where near the "True" +P+ fps loads that may damage pistols.

Look up what Underwood has for it's 115gr +P+ loads.........
Those high fps come from a 5" plus barrel on most of the data boxes.
I can get higher fps than the Federal +P+ ammo box
with a full load of Unique powder in a Beretta 5" pistol, that
is in most reloading manuals for a maximum +P loading.

I know S&W states no +P+ loads, since they are not registered.........
It is a great safety notice.....
but if one owns a chroney you will learn what the ammo is specked at.
Many a +P ammo is only good out of a 5" for the companies fps listing. Out of a 3 or 3.5" barrel it is just a standard loading.

I do understand that you don't need a +p fps in a load to get +P+ pressures, how ever.
One reason we all need to use new ammo with caution !!

.................

On you-tube there is a 4" Glock 19 that shot the Federal 115gr +P+ at 1236fps average.

The same pistol with a Speer 124gr Gold Dot +P had a 1204-1210fps average.

The Underweood 115gr Gold Dot +P+ load clocked in..... 1434fps !!
This is "the load" that you only shoot in approved weapons.