Lester Cox slug gun advice

[RockingKJ]

Almost a year ago I adopted this rifle. Recently I got a 10x Unertl, so a step closer to being able to attempt to shoot it. Any advice in the care and feeding is welcome. I’ve been a patched round ball shooter for years. Paper patched bullet shooting is foreign to me. It’s 1-15 twist, .357 outside bore diameter. With pristine bore. Nebraska is far from a hotbed of slug gun shooting so local knowledge is nonexistent. In search of appropriate bullet and data to shoot it.

 

[RockingKJ]

Are there any slug gun shooters out there? I have read reports they are a small and diminishing group.

 

[nkbj]

Hey there Rocking KJ.
You'll need this book by Ned Roberts.
https://babel.hathitrust.org/cgi/pt?id=mdp.39015060544213&seq=7

I've never worked with a cross patch rifle. Single, double and triple layer paper patching but not cross patch.
Do you know yet what diameter of bullets you need? Does the patched slug get engraved any for the rifling during loading? I have one rifle that came with an engraving die that cuts grooves to fit the rifling but such probably isn't the case with yours. I'd be real surprised if your bullet plus the patch thickness was not about .001" to .002" less than the bore. Is the bore maybe .350" or so?
Looks like you have an awesome piece. I hope you'll have reports posted.

 

[nkbj]

PS,
Of late Lee has a pretty good spread on diameters for push-through sizers.
They might have something you'll need.
https://leeprecision.com/custom-breech-lock-bullet-sizer-punch/