45 colt reamed to 454 casull

[normbro]

Hello,

I have looked around the faq's, but have not found much info on this subject, but I see folks reaming to 454 casull.

Question is, for those who have done this conversion, is the 45 colt still accurate enough to still shoot it in the new 454 casull chamber? Or is it now strictly dedicated to the new chambering?

I have a 45 colt BC H&R. Any experienced info appreciated.

Thanks,

Norm

[quickdtoo]

Lots of discussions on the topic, usually shoots Colt better after the rechamber if done with a reamer that cuts a decent leade in the rifling(GBO reamer!), but not necessarily with the same load as before the rechamber.

Tim

45 Colt to 454 Casull discussions

[cwlongshot]

With the proper rifle reamer, (The GBO rental IS a rifle reamer) Most actually see an improvement in accuracy!

Mine was a good shooter before and still is today as a 454.

CW

[giddens1972]

Mine shoots excellent and so does my Dad's.  I did both with the GBO reamer.  It's easy as pie to do and very inexpensive as compared to having a 'Smith do it.

[scratchmark]

mine also shoots better since ive done it.

[Doc Fillem]

Mine too. Very easy to do.

[ousooners1baby]

Now, can someone come up with the reason that it would shoot better after making the hole bigger? Obviously you don't want the bore to be too tight.

[quickdtoo]

The reamer doesn't change the bore, just the chamber length and beginning of the rifling.

Tim

Lots of discussions on the topic, usually shoots Colt better after the rechamber if done with a reamer that cuts a decent leade in the rifling(GBO reamer!), but not necessarily with the same load as before the rechamber.

Tim

[normbro]

Thanks for the feedback guys. I'm in for a reamer rental. 
 
Norm

[ousooners1baby]

I was thinking something and typing another. How can pressure affect the case? I am not saying it should not I am just asking if some of you that understand this more to expound.

[quickdtoo]

Here's a little readin for ya, related links at the bottom of the page.

Tim

http://bulletin.accurateshooter.com/2011/04/evaluating-pressure-signs-in-reloaded-cartridge-brass/

[ousooners1baby]

I read this and know no more than what I did before, Tim.  Shows what can happen if pressure is to high. "Signs could be this but it may not mean anything."
Does the reaming cause higher pressure? If it does, is that waht makes the gun more accurate? Of course, as long as it is under normal operating pressures.

[revbc]

Don't think accuracy has anything to do with the pressure.  The 45c seems to be more accurate after reaming because the GBO reamer cuts a proper leade into the rifling.  That's my take on it anyhow.

[ousooners1baby]

Sensible, Rev.