[mobirdhunter]

Originally Posted by Dean Romig

In reference to original Parker Brothers chokes (not Remington Parker chokes) we know that the beginning of the choke, sometimes beginning some six inches or so from the muzzle, started as a curve and terminated as an opposite curve and ended as a parallel straight section from 1/8” to as much as 3/8” at the muzzle. These chokes have often been described as an “ogee” by those who have studied and plotted these chokes. At some point in Ilion Remington stopped this practice and used their own choke formulas. I have several of Austin Hogan’s original plottings on graph paper that I will gladly share if anyone is interested.
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Dean, this is what I mentioned at the beginning of this thread. I just don't think my gauge, nor its operator, are quite good enough to measure that (what must be a) subtle curve. I have some guns that I am as certain as I think I can be are original and cannot determine the ogee choke. My original question involved the re-choking process and whether PB could produce that curve. Without backboring, would it even be possible?

I finished the biannual wipe-down/inspection of one safe yesterday. The next safe will get tackled on Tuesday, and I'll be sure to re-measure and photograph the subject gun.