16-09-2014, 10:08 PM
Albert Doyle Wrote:I think Mr Emary should be consulted. Is there any way to contact him and ask him where he got his .264 measure?
How can a .264 bullet be shot through a lands of .256? Does the pressure force the excess into the grooves therefore assuring good grip for the rifling spin?
Mr Lewis, we have Frazier's measurement showing .264 when the conversion is correctly done. Frazier measured an unfired bullet. I would also suggest Mr Emary was a fairly reasonably credible source and would not risk such a claim if it were that easily disproven.
.
That is precisely what happens.
As I have ppointed out on several occasions, and Bob has called me a liar in respect of, my 6.5mm rifle has a .268" groove diameter and it shoots .264" bullets just fine.
If more evidence is needed; this is a link to a page on the Norma ammunition website - Norma is one of the most respected ammunition makers in the World. It is a page of reloading data for the 6.5 Carcano round using a plethora of Norma 6.5mm bullets. As Bob correctly polints out they are all .264" diameter because they are for use in all 6.5mm rifles. They also make loaded ammo which uses one of the bullets on that list - gues what? It's .264" diameter.
To reiterate - yet again - a .268" barrel is not automatic 'proof' that a .264" bullet cannot accurately be shot through it. In fact, to the extent that Bob claims that it will be inaccurate, it is not even a likely outcome.
JL.