Ken bigdog I sent you the article via email ..

Article "says" that at the big end bore size is "erratic" , IOW not standardized I presume ..

Article does say that the true 4 is 1.052" and true 2 is 1.350" ..

This 2 is actually a four as it is a 1.052" bore ..

So why call it a two ..

I would really like a four , I shot one , a front stuffer , many moons ago and was a blast ..