The Brenneke 410 Silver Slug IMHO is considerable more effective than any other factory slug available for the 410 shotgun. I live in Ohio and deer hunting is limited to shotguns, some handguns and muzzle loaders, no rifles. Slug guns can be as small as 410. I have been hunting deer with a 410 slug gun since 2003. I have successfully taken two nice bucks with my Winchester 9410 lever action 410 shotgun. I have done a lot of testing of just about all the available 410 slugs on the market. Sort of an obsession... hobby of mine
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From all my testing the Brenneke slug are best 410 slug available for four reasons.
First the Brenneke slugs have the highest velocity of all the slugs I have tested. The only slug to actually deliver over 1800fps in actual testing in a three in chambered gun.
Some of the lighter slugs (Rem & Win 2.5in 1.5oz) will exceed 1800fps in a 2.5 inch chamber but loose a lot of velocity when fired in a 3 inch chambers due to gases bypassing the slug as the slug jumps from the end of the short shell through the chamber to the forcing cone.
In my testing I got a five shot average of 1866fps for the Brenneke slugs in a 3 inch chambered, 24 inch, full choke barrel. That is 888ft-lbs of muzzle energy. Most of the other slugs are closer to 700ft-lbs.
Second the Brenneke slug is the heaviest slug available. This give is the best ballistic coefficient and thus the slug retains more energy down range. Some of the 1/5 ounce slugs (Rem and Win) will have lost half their kinetic energy before they get 50 yards down range.
Third the Brenneke slug is cast from a harder alloy then the pure lead most of the other slugs manufactures use. This harder alloy combined with the heavier weight gives much better penetration. The soft lead foster slugs flatten very badly and often fragment badly reducing penetration considerably. With the marginal kinetic energy of the 410 slug you need all the penetration you can get.
Fourth, the Brenneke hybrid foster slugs, in my experience, have given the best most consistent accuracy in a variety of chokes. 410 shotguns are notoriously choke very tight and the Brenneke hybrid foster slug seems to shoot with more consistent accuracy from any choke. If your really serious about a 410 slug gun you are best served with a cylinder bore gun. This seem to shoot slug the most accurate in most cases.
I could ramble on a lot more but I won't and instead I will submit a link to my website where I have documented much of my testing and hunting experience with the 410 slug. I hope you will find it interesting and helpful.
http://mcb-homis.com/index410.html
The 410 slug is capable of a lot more than many give it credit.
mcb