Way back in the day, Grainger used to sell Maple butcher block counter tops 6' long 30" wide and 2" think for about 350 dollars. We used them in our shop. We had a huge bench vise attached to one of them and busted it, making it only 24inches wide. I have that 24inch wide piece as the top to my reloading bench. (I assume it's still there, I haven't seen my bench top in way too long smile ) It would be worth the expense, in my opinion to get a top like that for any new reloading bench build.
The beginnings of mine:
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I found some free drawer units and added them in.

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My shop space is roughly 12' x 24' Thank God it's not bigger or I just have more mess!

Stupidity is expensive
If you find yourself in a fair fight, your tactics suck!