Which features matter

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To start I love "hand cannons" I always have since I knew what the term meant.
I have long sought after a 460 S&W, but have waisted several years not buying one because of this dilemma and I hope someone here can help. I cannot decide between a BFR or a Smith. I like the long barrels, and I would be looking at the 10", 12", or 14" inch version of Smiths performance center, or either one of the 7.5" or 10" BFR. It would likely be the 10" versions.
The features;
The BFR is a solid platform. I own 1 and have owned another both in different calibers. They are strong, lock up tight, and are crazy accurate. I like them, and they are cheaper than S&W's offerings.
The Smith is also solid. I have also owned 2 X frames, still have 1 (both 500 mag). the 10" and 14" come with muzzle breaks. The 10" and 12" come with sling swivels. The 14" comes with a bipod. They are all double action. Smith advertises their gain twist rifling. I assume this is on all of the models.

The Gain twist rifling is the big one that gets me. Is this just a gimmick or something that is really needed with this caliber? I have never heard or read any mention of gain twist rifling on the BFR. I am sure it must have some positive effect or S&W wouldn't have Iimplemented it. But is it worth the extra dough for that and sling swivels/muzzle breaks. Double action isn't really a bonus for me. I do like the look of them though.
Also I haven't heard mention of the gain twist rifling for the Encore barrels either. i think they are only available as customs but i don't remember. I like the idea of the revolvers better though.
What are your thoughts guys? That 2014 bucket list thread got me thinking about this and I really want to get one this year and try and hunt some coyotes and maybe javelina with it.
 
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Gain twist rifling has been in use since black powder Kentucky rifle days.
The Italians used it on the Carcano rifle in the early 20th century.
The military used it on cannons.
S&W is using it now in the .460 revolver.

It helps to get a projectile up to full rotational speed, without it stripping out of the rifling.

It may have some real advantages on common sporting calibers, but whatever they might be has not proven benificial enough to make it mainstream so far after a couple hundred years.

Apparenty S&W thought it would help control the very high chamber pressure of .460, and also might give better long range accuracy.

For whatever reason, they didn't just do it to make rifling the barrel more difficult.
So they probably had a perfectly good reason for doing it, or they wouldn't have.

rc
 
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