Shooting slugs with a choke tube
this may be a really stupid question but i dont know the answer. i have a mossberg 500 20 ga. i do not have a rifled slug barrel, only smooth bore. i have had no problem shooting rifled slugs out of it for 2 deer seasons. at 75 yards i can keep them within a 4" circle, which is all i really need for deer hunting here. now i figured that it would be best not to use a choke tube while doing this. only problem is that when i do this, the threads in the barrel get dirty and make it hard to put a choke tube back in. what kind of choke tube can i use while shooting slugs out of this gun/barrel? thanks for the help.
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