I'd check your OAL again. For my 45ACP, I'm usually loading to about 1.20 or 1.22. While that seems very short, that's the recommend OAL for the powder I use, Titegroup. Another thing, is to make sure your crimp is tight enough. As mentioned above, it could snag on the shoulder a little bit.
You can probably test it out on like 2-3 rounds just to see if it will fit. You don't necessarily have to go to the range. What I do, with finger off the trigger, is pull the slide and let it slam back. The round should load and the slide lock forward. If it doesn't, pull the slide back so it ejects the round and let the slide slam forward again, loading the next round. See if it loads again. Make adjustments and repeat.
But with anything, make sure your firearm is pointed in a safe direction in case you get a slam fire. I always do mine in the basement in my cold storage room with ear plugs.