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NEED HELP BROWNING BT-99 Guys

1749 Views 6 Replies 5 Participants Last post by  Oregunner
I purchased a Browning bt-99 and it has a single star marked on the barrel so I thought it was full. After I got home from my first round of trap with it I measured the choke diameter and got .708. My question is "what is the standard bore diameter for the bt-99"? so I can figure out what the constriction is and if the fixed full choke was opened up.
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You could put it on paper and see what it looks like. (see link) I have an older BT-99 that has a .726 bore. If yours is close to that, it sounds like yours might be a loose mod. Or, maybe the barrel has been bored out and is still a full choke with an overbore. You really need a bore gauge or need to pattern it to see. Or you could just shoot it and not worry about it. Put some shot on the target and it breaks.We have a guy that shoots games at our club and does really well. He was telling me that he shoots an IC choke all the way back. I didn't believe him, but after he let me unscrew the choke, it was an IC. Can't argue with success.
 

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According to my Blue Book of Gun Values, Invector chokes became standard on BT-99s in 1986. Sounds like you have an unusual gun, maybe it has had a different barrel fitted?
 
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