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Back Bored - NOT


wymberley
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Any particular reason why you would NOT want a gun with over bored barrels? The 18.6 bore size is pretty widespread now with new guns and the concensus view is that it helps with both patterns and felt recoil. The concern about gas seal with fibre wads seems unfounded too, although I have my doubts about the DT-11 version of over boring.

Edited by Westward
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Any particular reason why you would NOT want a gun with over bored barrels? The 18.6 bore size is pretty widespread now with new guns and the concensus view is that it helps with both patterns and felt recoil. The concern about gas seal with fibre wads seems unfounded too, although I have my doubts about the DT-11 version of over boring.

I'm not so sure and given time from the info kindly provided - my oppo has at least one, if not two, of the guns listed - I'll find out as I don't have a gun with a suitable chamber size that isn't back bored to try.

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I put thousands of fibre rounds through a 686E with standard bore Mobil choked barrels then traded it for another Beretta with overbored 18.6mm Optima HP barrels and put thousands of fibre rounds through that one as well. I never noticed any difference in powder residue left in the barrels or reduced shell performance - the opposite if anything.

 

I haven't shot enough fibres through the CG (which has barrels stamped 18.6mm) to make a valid comparison, but I didn't notice any problems with the 100 or so I did use.

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I can't say I have found any detrimental results of using fibre through bsckbored barrels.i don't believe that gunmakers would spend a fortune and a great deal of time developing a gun without putting it through many tests with all types of cartridge.nearly all of my guns are backbored fibre might leave a little more residue but it's negligible.

Edited by bostonmick
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All optima choked guns are back bored along with Invector Plus. Mobil or fixed choked guns from the 90's will not be back bored neither are Invector barrelled guns.

 

I have guns that are both back bored and others not and cannot tell the difference by shooting them.

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Thanks again , Guys.

I'm not really interested in the back-bore /normal debate - just wanted to sort out my problem. Bought a load of cartridges to use in the Maxus. With my usual 5/8 choke I could only get just under True Cylinder and going up via 3/4, Full and X Full could not get past IC and after just 11 shots on one occasion I damned near wore out a new Payne Galway PB brush trying to get the barrel clean - never seen owt like it in over 50 years of shooting. Put them through my oppo's Invector Browning 325 with 3/4 in and got a very nice 67% with barrels as you'd expect for a fibre wad. Obviously, it's just the ones that I bought don't like back boring.

All sorted now, using these elsewhere.

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Intriguing, the back bored/fibre wad debate was already in full motion when i used to shoot competitions regularly years ago.

 

Counting the pellet distribution over a known area and distance is the only true way to work out the actual choking of a particular weapon.

 

You have established that the cartridges in question do not suit your over or back bored barrels but obviously do suit your mates gun.

 

I hope your new gun solves the problem and that you get some good kills as the ammo is great quality.

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Intriguing, the back bored/fibre wad debate was already in full motion when i used to shoot competitions regularly years ago.

 

Counting the pellet distribution over a known area and distance is the only true way to work out the actual choking of a particular weapon.

 

You have established that the cartridges in question do not suit your over or back bored barrels but obviously do suit your mates gun.

 

I hope your new gun solves the problem and that you get some good kills as the ammo is great quality.

Many thanks. Hopefully, I'll find out tomorrow and if the result resembles the one from Oppo's gun, I'll be well pleased. Having bought some cartridges that given a suitable degree of choke are perfectly capable of consistently killing pigeon at 45 to 50 yards but then having to limit the effective distance to some 30 yards and then spending more time cleaning the gun than one did shooting is non too clever.

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Gordon R on here has a sure fire way of cleaning dirty barrels with corks and boiling water in barrels, they then scrub out easily.

 

My way is don't bother cleaning them just shoot some plaswads and watch the fouling disappear then just the plastic marks to remove.

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