It's real dang mysterious trying to figure out what exactly bothers my throat and what doesn't. In an attempt to sort it out I've been doing a "blend of the week" experiment for the past year, where each week I smoke a single blend every day for a week and write down my experiences with it. Based on what I've learned so far I thought it was relatively untopped Burley and Perique that bother my throat, but the recent discovery that Five Brothers doesn't give me any trouble and some Virginia based blends with no Burley in them at all do bother my throat throws the whole thing into question. For reference, here's the blends I've tried for the experiment so far:
Blends That Gave Me A Sore Throat
Carter Hall
Condor Plug
Cornell & Diehl - Autumn Evening
Cornell & Diehl - Briar Fox
Cornell & Diehl - Corncob Pipe (And a Button Nose)
Cornell & Diehl - Haunted Bookshop
Cornell & Diehl - Interlude
Cornell & Diehl - Kelly's Coin
Cornell & Diehl - Old Joe Krantz
Cornell & Diehl - Old Joe Krantz Blue Label
Cornell & Diehl - Pegasus
Cornell & Diehl - Winchester
Escudo Navy Deluxe
Gawith Hoggarth & Co. - Dark Flake Unscented
Gawith Hoggarth & Co. - Dark Flake Aromatic
Gawith Hoggarth & Co. - Kendal Dark
Mac Baren - HH Bold Kentucky
Mac Baren - Three Nuns
Mac Baren - Vanilla Cream Loose Cut
Mac Baren - Vanilla Roll Cake
Middleton's - Cherry Blend
Orlik - Golden Sliced
Peterson - Irish Flake
Peterson - Royal Yacht
Prince Albert
Sir Walter Raleigh Aromatic
Super Value - Bourbon Whiskey
Sutliff - Pumpkin Spice
War Horse Bar
War Horse Green
Blends That Didn't Give Me A Sore Throat
Arango - Balkan Supreme
Capstan Blue
Capstan Gold
Captain Black Original
Cornell & Diehl - Cordial
Cult Blood Red Moon
Five Brothers
Gawith Hoggarth & Co. - Bob's Chocolate Flake
Gawith Hoggarth & Co. - Coniston Cut Plug
Gawith Hoggarth & Co. - Happy Brown Bogie
Gawith Hoggarth & Co. - Jamaican Flake
G.L. Pease - Union Square
Lane Limited - 1-Q
Lane Limited - RLP-6
Lane Limited - Very Cherry
Mac Baren - 7 Seas Red Blend
Mac Baren - HH Pure Virginia
Mac Baren - Vanilla Flake
Peterson - Early Morning Pipe
Samuel Gawith - 1792 Flake
Samuel Gawith - Fire Dance Flake
Samuel Gawith - Full Virginia Flake
Sutliff - 507C Virginia Slices
Sutliff - 515 RC-1
I've gathered quite a lot of data from my blend of the week experiments so far, but the results are a little nebulous. Generally speaking it seems like most blends made by Cornell & Diehl bother my throat, but then there's a couple outliers like Cordial and G.L. Pease Union Square that don't. For a long while I thought it must be anything with Perique or over 15% Burley content that wasn't heavily topped with something sweet that was the culprit, but Five Brothers threw that theory out the window.
At this point it seems a little random trying to figure out what will give me a sore throat and what won't, but I figure if I keep at it long enough than eventually a pattern will emerge. In the meantime I suppose I should just be grateful to have finally found a relatively plain Burley blend that I can smoke comfortably, even if it does have more nicotine than anyone probably needs!