When JB designed the 1911 the original spring weights were for a 14lb recoil, and a 23lb mainspring, when the ammo was changed from 200gr to 230gr then the recoil spring was changed to 16lb.One of my Colt 1911's had a similar issue and I installed a new Wolff recoil spring that was 1 lb. heavier if I recall correctly.
I think it slowed the slide down just enough to allow it to feed more reliably, but that's just a guess on my part.
I really like Wolff recoils spring packs, as they allow you to swap up or down, depending on the type of ammo you're shooting.
Increasing the weight of the recoil spring has little to do with a failure to feed, in fact, in many cases it makes the situation worse by increasing the slide velocity in the forward travel,, the slide speed can overpower the ability of the magazine to get the incoming round up into proper position.
The main resistance to the slide opening is the mainspring, a heavy recoil spring helps a small amount, but the mainspring does most of the work.
The key to reliable feeding regarding spring weights is to have enough "dwell time" when the slide is in the rearward position.
Of course this assumes that the feed ramp and barrel mouth are smooth and properly orientated with each other.
If the gun won't run with a 16lb recoil and a 23lb main, then their are other issues that need to be addressed.