Yes, and no. The 11-87 target guns run the 11-87 gas rings, where set up to run target loads, such as lighter loads and not have cycling problems with them as well, so correct on the statement of not wanting to run heaver than 1-1/8oz loads, since heaver would cause them to pound themselves apart.
But by swapping out the 11-87 gas rings, to the 1100 stack rings that don't seal off as fast, can run hotter, greater than 1-1/8oz loads in them, if you want to use the gun for say pheasant hunting, and not have the gun beat itself to death by the action cycling too hard.
As for the rem target auto's, takes a lot to get it to fit you, since does not have any cast, no adjustable check piece factory.
So if one was shopping for a target auto now, the A400 Xcel multitarget is about the best going.
Stock has adjustable cheek piece, stock can be adjusted for cast on/cast off, adjustable drop , as well has higher adjustable rib to boot. Throw in that different thickness butt pads are available , as well as end tube weights to swing weight balance it too, and no reason to have to take the gun to a smith to get it fit you correctly for a small fortune from the start (read you spending more up front, isntead of after the fact to have a smith start to work the stock over to get it to fit you in the end)..
Bottom line, the reason that the 1100, and then the 11-87 fell out of favor, is Beretta came up with a way to allow the 390 and later guns to have adjustable stocks on the gun to being with, which saved a lot of money by being able to dial the stocks cast/drop in without having to spend money on getting the stock to fit the shooters isntead.
Once they added adjustable cheek pads, and then adjustable rib on the auto, game was pretty much over for the rest instead.
Note, you could be the 1100 comp in synthetic stock with adjustable cheek piece, and even adjustable LOP pull butt pad recoil system, but problem was still, no way to adjust cast on or off, or even drop at heal on the stock. Throw in low rib that you get heat mirage half way through the box in a round of trap during not summer, little too much, too late in the game even with that rem gun.