Of course a tractor will never match a shovel but if a quality loader is fitted like a quickie or similar and greased often it can shovel finer stone pretty well. The trick is not too wide a bucket and an operator that crowds to help fill the bucket then clutches before wheels slip. Should be faster to load than an 8 ton digger. 2 ton on the back will keep her level for most work and is important to reduce front axle loadings. What are you loading?You'll be very disappointed with capacity, manoeuvrability, stability and robustness after a loading shovel....
Tractor loaders aren't great for repeated hard shovelling of stone etc