Sorry for the delay in getting back to you. Imagine my surprise in finding that indeed I had also used Chinook in my most recent recipe for Coor's Banquet. Anyway, here's the most recent iteration from about four years ago:
4# Weyermann Floor Malted Bohemian Pilsner
3# Rahr Pale Ale malt
2# Flaked Rice
8 oz CaraHell
8 oz acidulated
0.15 oz Hallertau Magnum FWH (5.3 IBU)
0.50 oz Chinook :05 min boil (8.3 IBU)
1.00 oz Hallertau Mittelfruh :20 min steep/whirlpool @ 90C/195F (1.5 IBU)
0.50 oz Chinook :20 min steep/whirlpool @ 90C/195F (5.1 IBU)
9.00 gallons distilled water (total: mash, sparge and top-off)
3.00 ml lactic acid (mash)
2.00 gr "Trifecta" (mash; BrewTan B, ascorbic acid, Sodium metabisulfate)
1.00 gr "Trifecta" (late boil)
1.00 gr Calcium sulfate (mash)
0.75 gr Calcium chloride (mash)
0.25 gr MgSO4 (Epsom)(mash)
Wyeast 2105-PC Rocky Mountain Lager (or other Andechs strain German lager yeast)
O.G. 1.042
F.G. 1.008
ABV 4.5%
SRM 3.5
IBU 20.2
BU/GU 0.493
SO4/Cl 1.8 (slightly bitter)
My notes indicate that the finished beer was very tasty and was a very good approximation of Coor's Banquet Beer. The calculated values for the hopping rates are a little higher (20.2 IBU) than normal, the sulfate:cloride ratio is slightly above "balanced" or "slightly malty", and yet the bitterness:gravity ratio of 0.493 is near the bottom range for lagers. I could probably delete the Epsom salt next time. As for the bitterness values, I can't explain it other than to say the AA% of both the Magnum and Chinook hops I used were listed on the high side and may have skewed the calculated values. I don't recall, and my tasting notes don't indicate, that the beer was in any way too hoppy however.
So there's the recipe and the numbers. I wouldn't call it a clone, but it was a close approximation, as well as a worthy tribute beer. Now you've gotten me all excited to brew it again! Cheers!