I would not use the load with 6.0 grains of 231 listed on that page.
5.3 grains of 231 with this bullet gets me a chronoed average of 831-885 fps depending on temperature. The 885 fps load showed some pressure signs - a bit of bulging at the bottom of the case.
You will probably need to load these at about 1.18 OAL for them to run in your gun. This doesn't improve the pressure situation.
They're great bullets, but you really do have to work up a load for your gun if you want something heavy for pins and want to keep all of your fingers.
I'm switching to Longshot with these bullets for an extra margin of safety.
Might also want to check into a heavier recoil spring or even a buffer of some sort. You are adding a lot of stress shooting thos heavier bullets out of an autoloader.
I have found for pins I like a heavy larger diameter bullet moving at mid range velocities. The faster you push the bullet the heavier the recoil so it is a matter of finding the line where you are not losing time to recoil but the load still has the authority to clear the pin quickly. A 250 grain bullet at 775-800 does this fairly well.