10 ga choke?
 

OK, I have a PH 10 ga twist barrels. Looking for help with what the chokes are. Micrometer at the bore is .739.
I don't have access to a bore gauge to see what all the numbers are. Does anyone know what the choke is just based on the end bore constriction number?
Gun looks to be unmolested/messed with.

Thanks for any advise.

The 10ga should have a bore of .775 so the restriction is .036 or full. BUT the only way to determine the choke is to measure the bore and choke restriction--no way around it.

No way to know for sure without knowing the bore diameter. If your gun is close to the norm for a 10 it should be around .775 which would give you roughly .036 of constriction. If it has been honed or over bored then that math is off the table, it could actually be tighter.

Craig we were pecking away simultaneously. :)

Measuring the bores and chokes tells you what the thousandths are, but shooting patterns, drawing 30-inch circles and counting pellet hits is the only way to know what the choke is with your intended load.

All of the preceding. A cheap way to get bore size is to use inside calipers that extend 5 to 6 inches into the bore. Expand until you get a good feel as in using a feeler gauge, i cover the contact surface with duct tape to not scratch the bore. Measure with the Mic. and do it a couple times to make sure it is consistent. That will give your bore diameter close enough to figure the choke diameter then pattern.