Shooting without a choke tube in place is guaranteed to crud up the threads
As for the modified choke a modified may or may not be OK from a safety standpoint but probably will negatively affect the accuracy. Spend $25 and buy a cylinder (.730") or skeet (.725") tube, it's what the slugs are intended to be used with
Like the title says I need a Remington 11-87 12 ga. Super Mag barrel seal activator. This is the small black ring that goes between the piston and the o-ring on an 11-87 12 ga.magnum to allow the use of 2-3/4" loads. PM me with offer
Bought this new and installed it but just could not adapt myself to it. Fired about 300 rounds.
Asking $580. Open to offers. Buyer pays shipping and insurance
You can end-run GB's garbage fees by posting a picture with your letterhead or business card etc. along with all the gun pix. People will contact you directly to ask what you really will sell it for. Be prepared to offer them a significant reduction. That's how I got my Lanchester for $1K less than the seller's asking price on GB, basically he sold it for what he would have gotten at his ask minus their fees.