What distance do you expect it to be good out to? I have a 20 ga that I scoped for Turkey, wouldn't mind adding the 357 mag to the mix if it was good past 50 yards and pushing to the 100 yard mark. I see they have an 18" available.

 

No experience with them (yet). Wouldn’t know.

 

Please keep an update here when you get a chance to get out - I am interested in your results. I never would have thought of this, and it would be a heck of a lot cheaper to go this route vs buying a used barrel that may/may not fit.

 

I bought a couple from short lane in a couple different caliber for my 20ga they work good 50 yd shooting I can keep them on a paper plate. I have the 357/38 45acp 45 lc 22lr 22mag. 410ga.

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What is the length of your 357 Mag insert?

 

Its 7in

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I am looking at one that is 18" long, its going into a scoped barrel and would be interested if it would be decent out to 75-100 yrds. Otherwise, it wouldn't be really much different than shooting foster slugs.

 

There are a few tricks to make them more accurate.

1. The insert needs to have a cutout or recess in the rim to bypass the ejector. Once the insert is in the barrel you don't want to have it removed after breaking open the barrel between shots. Ideally the insert should never move or rotate between shots. If there isn't a cutout in the insert rim to disable the ejector you can install one using a file or grinder. You just have to remove a little more rim than the width of the ejector.

2. O rings at the forward end of the ejector hold the insert inside the barrel. Using different sizes or O ring positions can help you get a tight fit.

3. Use moderate pressure loads or magnum/ rifle primers to keep the large diameter shotgun firing pin from cratering the primer. Low pressures or thicker primer cups may be needed.

4. Keep the chamber clean. Your finger nails are your manual extractor so if you cannot pick your brass out with your fingers then clean and or polish your chamber.

Follow these tips and you can make your insert shoot very well out to 100 yards.

 

Thanks for you observations LT

 

I have a 2 3/4" rifled adapter from them in 9mm and 357. Haven't shot the 357 yet but the 9mm even with all of maybe 1.25" of rifling is printing 4" groups off hand at 25 yards with cheap wolf ammo.