Thanks SecondChance. I have the Browning chokes, full, modified and imp. cylinder. I took the full out and put the modified in after lubing it up good with breech plug/choke grease. I won't be shooting it much and will remove the choke tube with each cleaning and clean the threads. I may get the extra full later on, it is an extended tube. I clean guns a lot more then I shoot them so I don't think I will have any problems.