Ive used them a lot even with the really hard kicking GMB54 and max loads. I don't like using them with a nice laminate though. The rear rest cover tends to get torn up and will easily scratch the stock.

I set mine up so the sled will slide back and i don't add bags unless i must. A moving blanket on a smooth top table works great. This will make it easier on the stock and scope. Its still best to verify POI off of some bags and only your support before you are ready to hunt.

The sleds POI and POI by only your support might vary enough to miss a longer shot. My lighter kicking target loads are basically identical but a heavy recoiling load might be off quite a bit vs the sled.