Just curious as to what barrel length people consider the minimum to have a real benefit of +P ammo? Since most people opt for shorter barrels in a CC gun, sticking with standard pressure to avoid the flash and recoil seems reasonable under 3.5" to me. Granted my new 6906 doesn't suffer from a recoil issue due to its all metal construction so I see no reason not to use +P in it. Thoughts? Specifically referring to 9mm but feel free to voice other caliber info too.