Just to throw this out there, ALWAYS get a second opinion. I’ll try to keep this (fairly) short.
So, my wife’s first handgun (still have it of course) is a Springfield full size double stack 1911. No, she is not a little tiny thing. She dislikes Glocks and other polymer frame pistols, doesn’t like the way the weight feels in her hand. The double stack 1911 was bought for home defense when I deploy (at the time the only gun we had was her single shot 20 gauge - it’ll make a mess, but you only get the one shot). When she got her carry permit, I got her a Bersa Thunder 380 Combat (rubber finger groove grips, green on black color). She had been talking about going back to a 1911 for carry as well, so she picked up a Springfield 1911 Micro Compact GI Edition in 45. The GI sights suck, so I had her get tritium sights done by a gunsmith. This is where the story picks up.
Get the pistol back from the gunsmith, it shoots consistently low at 5-7 yards with 230 grain FMJ. As in, I was taking my time and was hitting 5-6 inches low. Take it back, they mess with it, shoot it from a vise and tell us 4 inches at 5 yards. They then tell us that is due to the 3 inch barrel, and to get 180 grain as that will bring up the POI. Goes completely against everything I’ve ever learned about guns, but most of that has been with rifles so, hey, they’re the gunsmith right. Ask them about fitting a shorter front sight, to bring the POA and POI closer to each other. They don’t do their own machine work (slide had to be milled for the dovetails), they send their stuff to Browning for the milling. Browning only makes one size front sight. Buy lighter ammo. No other ideas from them.
I end up at another gunshop looking for something (forget what) and get to talking with one of their guys, he agree with me about the heavier/lighter bullet conundrum. It then occurs to me about putting a different rear sight. So, through some playing around - including me ordering the wrong sight - we end up with a taller rear sight installed on the pistol, and the POI is maybe an inch or so low at 7 yards with 230 grain FMJ. ((if anyone is confused on the height of the rear sight fixing the POA/POI, by raising the rear sight a little - we’re talking about 50 thousandths of an inch - it causes you to bring the front sight up to meet it, raising the angle of the barrel in relation to the sights and thus raising the point of impact))
Why go through all this trouble rather than just getting 180 grain bullets? Well, for one, 185 grain .45 ACP is typically jacketed hollow point rather than full metal jacket…not exactly what you want to use for target practice, or an 800 round 2 day shooting course for that matter. But the larger point being, the gun should be able to run good on basically whatever I feed it, and not have to get some hard-to-find stuff to be able to shoot it at all.