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Back bored barrels


Daveo26
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Right first time out with my new browning 525 on Saturday.

Got through quite a few cartridges!

Iv got a mix in my cartridge belt most are 32 g 6s all fibre wads.

Noticed something abit odd.

I had a eley high flier in the bottom barrel (shot first) and a gamebore super game high bird in the the top.

First shot both same load and shot size.

I honestly thought the second shot was a dud, definite difference in felt recoil, I checked the barrel after all clear.

Had the same thing with a fiocchi 32/6 and another eley,

It's everytime.

Basically eley VIPs and high fliers seem to kick like hell and the other brands are really, really gentle.

What's going on? Iv used exactly the same through a baikal and Lincoln o/u and can hardly notice any difference between different cartridges,

Could it be the back bored barrels not liking eley? Or is that just a marketing gimmick?

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Lighter gun or maybe just lighter barrels, I suppose either could make the difference more noticeable?

Just odd how some feel to recoil less and some recoil more than any other gun iv used these carts in.

You'd sort of expect a recoil reduction to be right across the board, weird

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you need to check the actual velocity coming out of the barrel. I just sold my mossberg for this reason. With the backbored barrels, I was losing a bunch of speed from fiber wad cartridges. I measured the same cartridges through my mossberg and O/U (standard barrel ID) and I was loosing 300-400 fps which wasn't acceptable for shooting steel. Plastic wad was no issue. I would assume a fiber wad with plastic obturator would be fine also. My hypothesis is that the fiber wads don't fill enough of the bore and gasses are escaping up around the wad and shot column whereas a plastic wad base can expand to fill all or most of the barrel ID.

 

thanks.

rick

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Try Hull Superfast 29 gram felt wads, excellent cartridge. Do you really need 32 gram ?

Iv just bought some hull 28g felts imperial game I think. So I'll let you know!!

Did you shoot the Eley cartridge from both barrels and if so was the felt recoil similar from both?

Yes same felt recoil, tried hi flier top and bottom. I wondered that too!

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Hull Imperial game are the only cartridges that I will put through my English SxS which weighs 6lbs 2ozs. I use both 28 and 30 gram without any felt recoil. The cartridges suit my gun and are very clean. You should be pleased with their performance.

Excellent, thanks for that

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Well they would be sub sonic then wouldn't they?

If that's the case, I'll have to stick to eleys!

 

No, the speed of sound is ~1050 fps. The cartridges were doing in excess of 1500 from the o/u, so even dropping 400 they would still be above Mach 1.

 

Try Hull Superfast 29 gram felt wads, excellent cartridge. Do you really need 32 gram ?

They were one of the cartridges I tried as I shoot them to good effect in my other guns. The mossberg didn't like them either.

 

Rick

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