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Jul 28th, 2025
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Joined: Mar 2003
Posts: 104
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OP
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Joined: Mar 2003
Posts: 104 |
Hello All,
Looking for info on Spanish choke markings... specifically Lanber- three stars (lower bbl) one star (over bbl). I'm thinking imp. cyl. and full... any specific info?
Thanks,
Hap
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Joined: Jul 2004
Posts: 287
Sidelock
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Sidelock
Joined: Jul 2004
Posts: 287 |
Life is too short to drink cheap wine
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Joined: Mar 2003
Posts: 104
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OP
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Thanks, hotrack! Seems reasonable, Mod and
Full(?)
Hap
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Joined: Jan 2002
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Cyl, IC, Mod and Full are US designations. The Spaniards follow the Brits, using Cyl, 1/4, 1/2, 3/4 and Full. Full in that system = 0.040", and the fractions are applied literally. Cyl is allowed a few thou (usually up to ~ 0.003") which sometimes seems to even out the cyl pattern.
Fred
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Joined: Feb 2006
Posts: 371
Sidelock
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Sidelock
Joined: Feb 2006
Posts: 371 |
anyone have a chart with translation from number of stars to choke?
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Joined: Dec 2001
Posts: 12,743
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 12,743 |
To add one bit to what Fred said the Brits do use the I/C choke. It normally ran about .006". I believe most continental makers do skip from ¼ choke to Cyl as he said. Most US I/C chokes are in reality British or Continental ¼ choke, having often .010" or more constriction. I am talking here of older guns, I do not know what constriction current guns have.
Miller
PS; the Stars are *=F(1/1); **=3/4; ***=1/2; ****=1/4 & CL=Cylinder on Italian guns.
Browning uses * = full; *- = I/M; ** =Mod; **- = I/c (really ¼) **S = skeet; & *** = cylinder.
Some choke tubes are marked with a fraction over 10, as 3/10. This would equal .3MM or about .012".
Miller
Miller/TN
I Didn't Say Everything I Said, Yogi Berra
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I guess "fractions are applied literally" was a bit cryptic. What I meant is that 1/4 choke = 1/4 * 0.040" = 0.010", and so on. Of course like everything else these have tolerances, and I don't have my charts from various countries at hand. For example, I think (from memory) Spain marks anything from 0.008" to 0.012" with ****. (And of course they use the metric system, so it isn't exact thousandths.) But choke is hardly a hard science anyhow.
Fred
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Joined: Dec 2001
Posts: 12,743
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 12,743 |
Fred;
"I guess "fractions are applied literally" was a bit cryptic."
What you stated is essentially the old British standard. They were considered nominally full = .040", 3/4 = .030", 1/2 = .020", 1/4 = .010", I/c = .006" & cyl = .000"-.003". This was my interpretation of what you were saying. It is also worthy of note that 1MM = .03937 (approx .040") so in essence both standards are equal. All I was adding was that I believe you were correct that continental makers did not normally make guns with I/C chokes, but the British did. In this case it was in fact a slightly choked cyl, less than a 1/4 choke. American guns as well as Continental guns built for the American market are more apt to have 1/4 choke, stamped as I/C.
Miller
Miller/TN
I Didn't Say Everything I Said, Yogi Berra
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Joined: Jan 2002
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Miller, I thot your addition was very helpful (as virtually all your posts are); my "too cryptic" comment was not motivated at all by your addition. It resulted from the "stars" question and the fact that I'd almost added the math example to the original post but was in a hurry and let the "applied literally" suffice.
Fred
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