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10g vs 12g 3.5inch chamber


Charlie R
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Just been looking at the cost of steel cartridges for both a 10 bore and a 12bore with a 3.5inch chamber. I'm surprised there are not more 10bore semis up for sale as the cost of the shells are shocking.

The 10g handles the larger steel shot sizes better than a 12g as the bore diameter is bigger so less constriction even in the choke plus, more powder in the cartridge gives it a bit more power when your after the Geese!...I think most users dont take the cost into consideration as its not as though you are firing off hundreds and like most folk have said, there are a lot of reloaders who will just load some to what spec they like, when they're require a few.

atb...Dale.

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Ive never used aftermarket chokes and have stuck to 1/2 in the semi which seems to work well in either the hatsan or the mossberg. I try to take shots in less than 35 yards so I assuming that at that range a 42g 12 or a 46g 10 are going to perform fairly similar?

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With the cost aside negated by home loading are the patterns that much better?

yes, the 10g patterns better with steel (large sizes) as they're not constricted as much. Steel does'nt compress like lead and reacts badly to being squashed, just like "Ball Bearings" they'll bounce off one another. A good 1.5oz or heavier load, Buffered, patterns well out of a 10g. Edited by DerbyshireDale.
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With the cost aside negated by home loading are the patterns that much better?

 

Yes they are far far better and also despite claims to the contrary I tested 3 1/2" 12 against 10 ga both Nitro steel at 50 yards and found significantly more energy in the pellets (going clean though the 9mm ply backer in the ten and just getting a few through in the 12.)

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Could I ask what the 12g? I have a mossberg 935 which has a fairly chunky barrel, ie its backbored i believe so maybe more akin to a 10g. I will run some tests with it comparison to the hatsan and come back to you gentlemen.

 

Winchester SX3 tried with std and aftermarket chokes in the 12. The ten is just a Zabala sbs I had the chokes taken to 1/2 ans 1/2 on and no lengthening of the cones ot nothing fancy. If you were asking about firing heavy 12 ga 3" class loads out of a 20 the answers would be the same (3 1/2" super mag 12 is a shoe horn job)

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