What are the diameters of the 12 gauge bore and the advantages of over boring or can a gun be too much overboard?
Bore diameter
Chicken630
21 - 36 of 36 Posts
Joined
·
9,941 Posts
Many have seen the Perazzi promotional video about this, AA. The part that most interested me was that the maker had been able, with the new bore diameter, to achieve both reduced recoil and increased pellet -penetration.
This is indeed an impressive claim, since it infers both greater speed and reduced recoil. People have been trying to do this since Newton and the only fuss made about it is a short video? I would have thought that a rewriting of Newton would have made more of an impression...
Of course, this is small potatos compared to Federal's claim of 14% recoil reduction with the Gold Medal Grand shells accomplished by adding about a quarter-inch of air space in the new 12C5 wad, so we should expect Stellium III+ barrels from Beretta to have negative recoil if they have any at all.
I suppose that a whole different ballistic technology must be required for your counter-clockwise spinning birds, or do your clocks go the other way too which I guess would make changes unnecessary?
Neil
This is indeed an impressive claim, since it infers both greater speed and reduced recoil. People have been trying to do this since Newton and the only fuss made about it is a short video? I would have thought that a rewriting of Newton would have made more of an impression...
Of course, this is small potatos compared to Federal's claim of 14% recoil reduction with the Gold Medal Grand shells accomplished by adding about a quarter-inch of air space in the new 12C5 wad, so we should expect Stellium III+ barrels from Beretta to have negative recoil if they have any at all.
I suppose that a whole different ballistic technology must be required for your counter-clockwise spinning birds, or do your clocks go the other way too which I guess would make changes unnecessary?
Neil
Joined
·
7,122 Posts
No mate, we're Aussies. Recoil doesn't bother us. In fact we bash people who have a recoil pad of any sort on their gun.
Joined
·
152 Posts
I hope I say everything right ,,, I have a Baker Big Bore 84 which I am told is 840 in the bore, on a TMX frame ,It seems to do the job ,smokes targets with FGM red dot and a 12so claybuster wad..
I don't have it too long ,like got it at the end of summer and been breaking 46 and up to
50 x 50 . When I shoot AA with CB AA clone I get some weird sounding ones ,but still break the bird .
Any one have any insight or have ever had a Baker BB 84 Thanks CC
I don't have it too long ,like got it at the end of summer and been breaking 46 and up to
50 x 50 . When I shoot AA with CB AA clone I get some weird sounding ones ,but still break the bird .
Any one have any insight or have ever had a Baker BB 84 Thanks CC
Joined
·
7,122 Posts
.840 is 8 gauge......
Joined
·
152 Posts
That's what is stamped on the barrel Baker BB84... thanks for the reply CC
Joined
·
7,122 Posts
.840 is 21.34mm. Makes those Perazzis at 18.7 look positively skinny.
Joined
·
14,750 Posts
Given that the chamber diameter of a 12 gauge shotgun is 0.798 inches, this barrel of yours would have a "negative forcing cone." That is, just after the chamber, the inside diameter would get bigger, from 0.798 inches to 0.840 inches.
I'll say that again. That is bigger than the outside diameter of a 12 gauge cartridge.
I think your memory, or what you have been told, may be faulty.
Now, that said, I am pretty sure I remember that Stan Baker Big Bore barrels were bored to 0.800 inches, or roughly the same diameter of the muzzle end of the chamber.
I also seem to recall that very few people actually use them since they, like other big bore barrels, don't perform any better than normal dimension barrels.
Joined
·
9,941 Posts
The Baker BB84 (Baker Big Bore 1984) has a diameter of 0.8". The one I have shoots fine in testing but does not do any of the amazing things that were claimed of it in the multitude of articles that were written about it on its introduction. Don Zutz, for example, required two issues of Shooting Trap to say enough good things about it. An odd thing is that I couldn't make a consumer chronograph work in confirming the greater shot-speed that all the other reviewers reported, which went along with the reduced recoil they all lauded. My speed readings were all over the place and I couldn't get any of the paired chronographs I use to test every shot to match one-to-the-other.
I'll have to get around to writing up my test, but since the gun has never totally taken over the sport as so many writers predicted it would, I think the pressure is off and I can wait until I can figure out how to measure its shot-speed before getting down to work.
Neil
As a side note, the gun required a wording change in ATA rules from "12 gauge" to "12 gauge chamber" because in bore size it's a 10 gauge or something.
I'll have to get around to writing up my test, but since the gun has never totally taken over the sport as so many writers predicted it would, I think the pressure is off and I can wait until I can figure out how to measure its shot-speed before getting down to work.
Neil
As a side note, the gun required a wording change in ATA rules from "12 gauge" to "12 gauge chamber" because in bore size it's a 10 gauge or something.
Joined
·
2,644 Posts
The Baker Big Bore was nothing more than a re-emergence of the "chamberless" guns of the early 20th Century. And not surprisingly the same hype! Stan was a good guy and did some beautiful work tho.
Any bunker or pigeon shooter can tell you that 18.4 bores hit harder and are the most desirable for those games. Common sense tells you that the 18.4 bore compresses the shot charge more and as a result hits harder. I'm pretty sure that's how it works. Which of course makes bigger bores something for sissies.
IIRC one of the Russians when asked about the monster loads they shot said We are not children. They prolly had 18.2 bores.
Any bunker or pigeon shooter can tell you that 18.4 bores hit harder and are the most desirable for those games. Common sense tells you that the 18.4 bore compresses the shot charge more and as a result hits harder. I'm pretty sure that's how it works. Which of course makes bigger bores something for sissies.
IIRC one of the Russians when asked about the monster loads they shot said We are not children. They prolly had 18.2 bores.
Joined
·
2,515 Posts
.729" is the world standard for a 12-bore.
The guys with overbored guns .735" and above, will tell you that is the way to go.
The guys with non overbored guns .734" and below, will tell you that is the way to go.
In other words, no one will ever agree.
This is why women should be the rulers of the world...........
The guys with overbored guns .735" and above, will tell you that is the way to go.
The guys with non overbored guns .734" and below, will tell you that is the way to go.
In other words, no one will ever agree.
This is why women should be the rulers of the world...........
Joined
·
152 Posts
So, the BB 84 means 1984. I didn't know this ,the only reason I have this gun is because the guy that had it wanted something shorter and lighter, and I had a TM1 that I didn't care for so we swapped . he is happy with the one I gave him and I am happy too.Even with that barrel, it is a TMX and I'm gonna look for a barrel ,and make a TMX out of it , I will shoot it for a while when it gets warmer and then in the safe it goes, unless it does wonders for me lol..
I have a TM1 with a money maker 4 pin adjustable rib and Briley tubes and all the adjustments that I know works..
So ,I thank every one on here for their advise and replies.
Is there anything that someone on here doesn't know? lol,, Thanks again,, CC
I have a TM1 with a money maker 4 pin adjustable rib and Briley tubes and all the adjustments that I know works..
So ,I thank every one on here for their advise and replies.
Is there anything that someone on here doesn't know? lol,, Thanks again,, CC
Joined
·
7,122 Posts
Yup. How to please women.
Joined
·
30,336 Posts
There are a number of women on here. I bet if we asked they would each give a different answer.
Joined
·
7,122 Posts
Yes, and then change their answer 20 minutes later.
Came across this thread from a search and didn't want to open up a new one, but I measured my Benelli M2 a few years ago at 0.721" (it's a 2012 manufacture). I've put several thousand shells through it for trap shooting, and just measured it again at 0.721". I've read numerous times that the Italian brands like Beretta/Benelli are often tighter than the traditional 12 gauge bores.
When Benelli used to have proof markings for barrel diameters, I've seen 18.3mm as a common diameter for M1s and M4s.
When Benelli used to have proof markings for barrel diameters, I've seen 18.3mm as a common diameter for M1s and M4s.
Joined
·
1,403 Posts
All of the Perazzi and Beretta barrels that I've measured with a Baker bore mic have all been 0.725 or smaller. 'Cept the TM1's of course
But then I don't have any "modern" guns
But then I don't have any "modern" guns
21 - 36 of 36 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
