Backboring, Invector Plus Choke Tubes... what does it mean?
I'm a little confused by the relationship between backboring and invector plus choke tubes as it pertains to Browning shotguns.
If I summarize my research, Browning made these Invector Plus choke tubes to fit a shotgun that had been backbored. Backboring is a process of increasing the internal diameter of the barrel beyond what has been accepted the norm. This was done because some people believe it increases pattern quality.
Browning shotguns (at least some/all Citori's) come backbored from the factory. So, they need to use these invector plus or alternative product choke tubes.
Is that it? Is there anything else special about these invector plus choke tubes?
Also, I've been told that using a rifled barrel with shot loads will widen signifantly the pattern at even a short range. Is that true? Would it be possible to get similar results using a rifled choke tube in a smooth bored barrel?
Thanks for your help.
Cheers,
M
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