I have been making them using military. 308 using the Rcbs die set for many years.
They always cycle for me in the 1911 pistol and I have used 30 06 cases to make them for shooting the Ruger .45 acp cylinder in blackhawk single action.
You just can't expect a decent pattern without a shot wad to enclose the shot thru the barrel.
They will blow thru there with just a gas check top and bottom but only make hits at such close range as you could kill a snake with a long handled hoe or shovel.
Just a big waste of shot.
These loads with a wad only need a small amount of shot and put it all on target.
Other wise, you may as well just use the old 20 or 16 or 12 gauge shotgun.
I got a 25 pounder of 12 size shot back when it was available and I have plenty left.
Use no 9 if that's all you have.
I helped others load shot and many times they reuse the old aluminum cases that held shot before and they fail to resize the case.
Then malfunctions happen!
And I can't believe loaders who want to crimp the case like the factory.
That ruins the case!
Always use a shot sleeve to enclose the shot
Any other way is a waste of good shot in a rifled barrel IMHO.
Good Luck!.