I, too have a 28 Gauge 28" barreled Reproduction Parker: The chokes were "Mod/Full,"
and when measuring them; the left barrel came out at 45/1000ths. I had a gun I loved, but couldn't hit with. 45/1000ths in a 28 gauge is, for me, just way too tight.
So, they are currently at my gunsmiths for opening to 1 & 3, just as the other Gentleman has done. I had him open them to 5/1000ths each, and they were still too tight.
So, we shall pray and see.

The chokes were opeNed up to SKEET
ON THE RIGHT AND IC on the left side by Briley.
The cost plus postage was 230.00

I shot one round of skeet today and shot a 23.

The change was dramatic from full and mod.

Was I glad I did it....yes...the barells were useless
To me as they were...did I ruin a collectible 2 barell set

NO

Several years ago a friend of mine had briley install chokes in his 20 gauge Repro. The first time he took it hunting about 2" of barrel muzzle turned up missing.

I guess the moral of Briley tubes in Reproductions is "Don't do it!", at least in the 20 & 28ga. Those relatively light barrels are obviously one of the reasons the guns seem to move so well.

I guess I was lucky they did not do the thin wall chokes. I am super happy
with the open chokes of IC and SKEET and would recomend it.
Realy how many people use Mod and Full in a 28 gauge, I know every body talks about shooting doves with those type chokes but they would have to be a lot of them comming in and the person has to be a super shot.

I shot my personal best score ever at our club's 5-Stand with a set of 28-ga. Repro M/F set of barrels. In addition, when shooting Sporting Clays I found it makes little difference whether the 26" Q1/Q2, 26" IC/M or the 28" M/F barrels are aboard--I score about the same. I freely admit, however; that when shooting Skeet or pursuing woods birds, open chokes are the better choice.

After reading this thread I had to measure my 28 barrel chokes. The 26" IC/MOD are .005 and .015. The 28 MOD/FULL are .015 and .035!! No wonder I could not hit those incoming Doves last season. I have made some impressive shots on Valley Quail with the 26 barrels. i have an AYA #2 with 27" barrels that measure .005 and .014.

28 Ga chokes that are as tight as .015 & .035 are for Pheasants and Doves/Pigeons. That probably is the limit of their effective hunting usefulness. Even then, ranges need to be limited/managed. The tighter chokes compensate for the lower pellet count. You either hit them hard or miss completely. I've opened mine to Light Mod. and Improved Mod. which do the job well on many species. In fact, that combination is my favorite for all the gauges.

I have a 20 ga 28" repro with Briley thin wall chokes installed. They were in the gun when I bought it. I have had no problems with them and don't really have any complaints. I have found that a choke of .005 and .012 is a wonderful combination on the clays and dove field.

I think you can get away with Brileys in 12 and 20 gauge repros.The 28ga barrels are so thin to start with that there is not enough metal in most of them to install chokes.I have thinwalls in my 30" 12ga barrels,but have never seen a 28ga with them.