TargetTalk

I'm looking for info on very light loads with 150 gr bullets in 45 ACP. I prefer not to use Bullseye on an indoor range. Clays or TiteGrp preferred.

It will take 4.4- 4.6 clays to function a 1911 with scope on slide with that light a bullet. with iron sights 4. will work

I use 3.7 of Clays with a 160g bullet. However, I have a frame mounted dot and a 13 lb spring in my guns. If your gun is a little lose on the rails because you have put a lot of ammo through it, the spring can be a little heavier and still function well. I use a much hotter load and a heavier bullet for the long line, and my 13 pound spring handles both loads just fine.
If you have a new gun, you should probably break it in with several thousand rounds of at least 185 or 200g bullets before you even attempt to load a 150g bullet and get it to function.

If you are trying to get the lightest recoil you will do much better with a heavier bullet and the slowest powder you can come up with. When the bullet is light it takes a sharp powder like Clays, Bullseye etc. and the recoil is more noticeable. The minimum energy to cycle the slide is the same whether the bullet is the lightest possible or the heaviest but the felt recoil is not the same. Some time ago I used a 155 from Silver Bullet from New Baldwin Illinois trying to get light recoil for shooting plates out of my Les Baer wad gun. I used Bullseye then and don't remember how much but when it would finally run the recoil was excessive and I changed to a 200 with a pull down powder that was known as BE 84 at that time and was eventually released to the public as Power Pistol. The 200's felt recoil was a lot less and more easily managed shooting fast. The 200's were a lot more accurate also but I didn't care about that as we were shooting at 10 yards.