Generally, the bullet weight limitation is for hard recoiling loads being used in the gun. You can test it yourself, and its easy to do. Just get a 2" micrometer, or any dial calipers. Go to the range and measure your ammo. I take a magic marker and number the rounds, starting at 1 and going up. Then on a piece of paper I write the round number down and the length prior to firing any shots. Then I fire one shot and remeasure, then another and remeasure, and on. If there is any "pull", it starts showing up after the first or second shot. If its significant, you shouldn't use that ammo in that gun. Normally 148gr wadcutters, or even 158 gr round nose standard velocity just doesn't create a problem.
Where the devil starts doing the bad work is on your reloads. I seriously doubt that you'd see any pull on factory ammo. I also doubt that you'd see any with newer and resized brass. But some of us are a little careless and reload for old steel revolvers. Its real easy to have a case or two that has seen a lot of service become loose. If it doesn't hold the bullet tightly, regardless of soft lead or jacketed, you have the potential for a problem.
