Iggy42 Posted January 3, 2015 Share Posted January 3, 2015 Ok so depending on the model of Tanfos you get either a cone barrel or a straight barrel Question is, besides the shape what are the advantages or disvantages? Is one better than the other? Link to comment Share on other sites More sharing options...
BrazeauRacing Posted January 3, 2015 Share Posted January 3, 2015 Cone barrel locks up tighter with the slide, which should be more accurate. And the extra weight on the end of the barrel should help reduce muzzle flip. Link to comment Share on other sites More sharing options...
kneelingatlas Posted January 3, 2015 Share Posted January 3, 2015 I haven't noticed any difference in accuracy, but I can definitely feel the extra weight. Link to comment Share on other sites More sharing options...
Endall Posted January 3, 2015 Share Posted January 3, 2015 I have guns with both. The cone or bull barrels are all 3.5" or shorter. So accuracy is hard to evaluate versus a straight. To hold the end of the barrel the tightest, a hand fitted bushing would be hard to top. That is why the Accurized CZ are modified for a bushing. Spent an hour last week knocking a thousand off the OD and ID of two EGW thick flange, tapered bore barrel bushings. Ordered to exactly the size of the barrel and slide and took down with emery cloth to an interference fit. These are for a GCNM, not a Tanfoglio. The factory Match bushing was fitted to 0.002". The two I did are 0.0". A couple hundred rounds will loosen up the ID a little. The OD will remain zero slop. Over time both a bull barrel and a straight barrel will loosen up. The barrel rubs directly on the slide. But this should take a lot of rounds if lubed. The larger OD of a cone barrel theoretically will wear down slower. Not sure if that is the only factor at play. Link to comment Share on other sites More sharing options...
Kingman Posted January 3, 2015 Share Posted January 3, 2015 Endall the limited elites are cone. Link to comment Share on other sites More sharing options...
Endall Posted January 3, 2015 Share Posted January 3, 2015 My Limited Pro is a straight barrel. Link to comment Share on other sites More sharing options...
BeerBaron Posted January 5, 2015 Share Posted January 5, 2015 in real life there is bugger all between them. I can see why in theory the cone barrel is a better thing and why it's on the 'premium' spec guns. in practice you'd be hard pressed to notice the difference apart from the weight. oh, the other thing you notice is the cone barrel looks awesome! Link to comment Share on other sites More sharing options...
Onagoth Posted January 5, 2015 Share Posted January 5, 2015 In a related vein, is there any difference in accuracy for the standard rifling vs polygonal rifling? Link to comment Share on other sites More sharing options...
BeerBaron Posted January 6, 2015 Share Posted January 6, 2015 I honestly dunno. If I could get one gun with 2 barrels and a ransom rest I might find out. But then one type of ammo might work better in the other barrel. I have a friend who bought a stock 3 extreme a few months back. He got 2 barrels with it. One poly. One regular. I'll ask him what he thinks. Link to comment Share on other sites More sharing options...
johnbu Posted January 6, 2015 Share Posted January 6, 2015 I heard around the gun counter that poly rifling is lower friction than standard, so you get higher velocity. No idea at all if that was real or real BS! Link to comment Share on other sites More sharing options...
Onagoth Posted January 6, 2015 Share Posted January 6, 2015 I've heard, albeit anecdotally, that poly barrels shoot cheap bullets better...but I'm not sure how much to believe on that. Link to comment Share on other sites More sharing options...
Iggy42 Posted January 6, 2015 Author Share Posted January 6, 2015 I know my poly rifled AR barrel cleaned a lot easier than standard Maybe that is the theory for better accuracy - less fouling = less deviation Link to comment Share on other sites More sharing options...
Nealio Posted January 6, 2015 Share Posted January 6, 2015 I think in theory the polygonal rifling seals better due to the lack of sharp square edges. Also you are smashing the bullet into a shape, not just cutting slots in it, so in theory the bullet should fit in the rifling tighter. Link to comment Share on other sites More sharing options...
Onagoth Posted January 7, 2015 Share Posted January 7, 2015 anybody aware of any somewhat formalized testing around this? Link to comment Share on other sites More sharing options...
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