Your 463 has a Rated Operating Capacity (ROC) of 700 pounds.
The 50" bucket weighs 202 pounds. This only leaves you 498 pounds for material.
The 50" bucket has a struck capacity of 8.5 cubic feet. If you level fill the bucket, the material must weigh 58.6 pounds per cubic foot or less to keep you within the ROC.
Here is a list of common materials and their weight per cubic foot. Dry Loose Dirt is approx 76 lbs per cubic foot. A full bucket will make your machine very nose heavy. You may end up only being able to take partial buckets on many common materials.
You may also find you don't have enough traction or machine weight to get 50 inches of cutting edge to penetrate into the soil.
Hope it works out for you.
Material
Pounds Per Cubic Foot
Copper Ore
262
Slag, Iron
172
Quartz, ground
165
Gypsum
159
Limestone
155
Sandstone
143
Sand, wet
126
Earth, wet packed
115
Clay, damp
110
Lye
106
Cement, Portland
94
Shale
92
Gravel
90
Sand, dry
90
Stone, broken
90
Concrete
86
Earth, dry loose
76
Potash
68
Clay, dry excavated
63
MAP,DAP
60
Paper
58
Bone Meal
57
Sulphur
55
Rubber, scrap
50
Beans
48
Potatoes
48
Soybeans
48
Wheat
48
Coffee Beans
45
Corn
45
Flax Seed
45
Urea
45
Malt, dry
45
Rice
44
Sugar Beets
40
Coal
40
Snow, wet
40
Barley
39
Ice
37
Lime
36
Ashes
35
Charcoal, Oak
35
Salt
35
Coke
32
Oats
26
Cottonseed, Dry
25
Sunflowers
24
Hay (Baled)
20
Peanuts, shelled
18
Wood, chips
18
Wood, sawdust
15