20 ga 26" - 1/16
20 ga 28" - 1/8

My 28ga two barrel set:
28"barrels (M/F) gap approximately 3/32"
26"barrels (IC/M) gap approximately 4/32"

My 28ga. repo with 26" barrels is spaced around 3/32". Wish I had a set of calibers to give you a precise measurement.

That's close enough John. My 28 ga. 26" barrels have the same gap.





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Here is a VHE double trap gun that is very late Remington. In the serial number book, it’s on the very last page. The barrels touch at the muzzle.