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A friend and I ordered 32 gauge guns from the Poli's when they attended the Southern SxS in 2003. We wanted something to shoot in the 32 gauge event at the Vintage Cup.
I wanted a 28" IC/Mod 32. Poli said they would have to use a 28 frame, hence the 28 ga barrels. I figured the old "in for a penny in for a pound" and asked about .410 barrels. I ended up with my 3 gauge set.
My buddy wanted a 24 ga/32 ga. His gun is also an Anson Extra but built on a 20 gauge frame. It weighs a good pound more than my gun. My 32 is 5 3/4 lb, his is 6 3/4. They are a totally different experience to shoot.
I use the 32 on pen raised quail. It is a blast.
When we were spec'ing the guns, I asked if we could have 2 3/4" 32 gauge chambers, wouldn't the Italian Proof House balk at an odd proof? The answer was no, they'd proof anything.
So to my knowledge there are only two, 70 mm proofed 32 gauge guns. I have the proof house letters for my gun. Both 32/70mm guns are here in Charlotte.
We haven't gotten around to getting brass made or fiddling with loads. The 32 is basically a 50 cal shotgun. A 2 3/4 32 hull with a 50 cal lead ball ought to be a blast at pumpkins or deer, but that's a future project. I just finished moving and things are in disarray.

Joe