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Old 01-21-2011, 03:54 PM   #11
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My SC Trap 32" barrel is choked at .040. My LC Olympic SB is choked at .039, and my M12 (1960) is choked at .036. Guess they liked them tight in those days pre plastic wads.
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Old 01-21-2011, 04:05 PM   #12
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Quote:
Originally Posted by Bill Murphy View Post
Kurt, what is the bore diameter of your single with the .045 constriction?
If I used the bore gauge correctly then I come up with .740, mfg 1924.
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Old 01-21-2011, 04:43 PM   #13
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Kurt, just FYI but I had a well known Parker collector approach me after looking at my SC and asked me if I knew my vent rib was loose. He pointed out that where the vent rib starts at the front of the chamber area, the solder had released. You can pull up on the rib and feel it move. He said this was not uncommon on Parker SBT's. I did notice that a small spot of the bluing is worn off where the rib makes contact but never gave it a thought that there was a problem. Not structurely important so it's not worth fixing. Just thought you may want to check your's.
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Old 01-21-2011, 04:53 PM   #14
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Chuck, Funny you should mention that. Dean shot my SBT on New Years Day in NH. After he shot it he showed me that the rib was slightly loose at the breech. I have probably put 100's of shells through it without noticing. I was debating getting it fixed. I wonder how many of these guns are like that?
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Old 01-21-2011, 05:25 PM   #15
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Great looking SC. The Jenkins?? pad is a real piece of trapshooting history. Don't replace that pad.
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Old 01-21-2011, 05:36 PM   #16
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QUOTE=Bill Murphy;33366]Great looking SC. The Jenkins?? pad is a real piece of trapshooting history. Don't replace that pad.[/QUOTE]

Yes, it is a Jenkins. When I got the gun it wasn't fit all that well and the yellow line was indistinguishable from the rest of the pad. A little bit of sanding and it looks really nice. It is a neat pad. Deep green and yellow is a little out of the ordinary for a pad. I do wish that it was stocked a little higher. Maybe I should have the stock bent.

Does a .740 bore sound about right or has it been cleaned out some ??

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SBT BORES
Old 01-21-2011, 07:29 PM   #17
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Default SBT BORES

My 34 inch SC is .733 /.700 My SB was .731/.694. The SB was undoubtedly a 27 yard Handicap gun; there is a note about the pattern; 320 of No 71/2 at 40 yards.

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Old 01-22-2011, 07:37 AM   #18
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Like Kurt and Dave my 34" SG, SC came to me with a loose rib. I thought at the time it was uncommon but now? That gun also had very long choke of .042. You just have to be patient and let the clays get out there a little and then turn them to dust.
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Old 01-22-2011, 09:44 AM   #19
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I measured the bore on my 30" 1938 SC. It,s .729 with .038 of choke 5'' long
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Old 01-22-2011, 12:27 PM   #20
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Kurt, Austin and I have both commented in the past about Parker competition guns that have bores larger than the nominal .729. The Parker order books are full of requests to make patterns tighter, clean up bores, you name it. Your gun could have been returned to PB to tighten the pattern. The easiest way for them to tighten the pattern is to enlarge the bore without enlarging the choke area. However, there seems to be some evidence that some singles were originally manufactured with large bores.
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