I agree with this I have I have loaded this same bullet. I had to seat at 1.19 to get proper function in my 1911sRNFP bullets are the light version of the 250 gr cowboy bullets. 200gr or 250gr rnfp......seat them at or just below the wax ring/crimp groove.
Mine have all chambered and functioned great at 1.175 to 1.195 oal.
Load recipe's don't change even though the oal is shorter than a lswc (H & G style).
Just looked at your bullet at Missouri bullets site
Now it makes sense to me why everyone is using a shorter COL
(My bad as I should have checked the site earlier)
Missouri is selling you a 45 Colt bullet with a crimping groove to use in your 45ACP
(True 45ACP bullets have no crimping groove or cannelure)
Nothing initially wrong here but when seating bullets try and seat so case mouth is “slightly” (A few thousandths is all that is needed) either "above" or "below" the crimping groove, especially if you are going to apply a Taper Crimp to the cartridge.
They sell it as a 45 ACP at 18bh and as a 45 Colt at 12bh. I have always used the 12 in my ACP. Same bullet a little longer is their 250gn Colt.