+P ammo should not make any .45 auto in good shape "blow up". It will result in wear on the gun being faster. You will not want to shoot a lot of it without going to a stiffer recoil spring.
Some HP ammo IS +P. Usually marked on the box, and the cartridge case head.
Also going to cost a lot more than plain Jane 230 gr round nosed standard ammo. But as said, what makes it +P is that it is loaded to higher pressures than standard ammo.
Most important characteristic of self defense ammo is that YOUR pistol feeds, fires, extracts and ejects that round 100.00000% of the time. Some guns don't like HP, some don't like SOME HP, etc.
If the guy that said it would blow your pistol up works at the shop, find another gun shop. That is a doofus.
Ignore below picture- wrong pic, cannot delete.