Micrometer trimmer vrs motorized trimmer

[gtl1946]

For accuracy shooting the reloader will use a hand crank Wilson ,Sinclair etc. rather than the Lyman or RCBS motorized trimmers . Are the motorized trimmers that inaccurate and is a 0.001" in case length going to the extreme . Is the potential squareness diferences between the two methods REALLY going to show up on target . It's easy to say, I really don't want to find out but has anyone actually done THE TEST? I know the theory - - but ?

 

[Immike]

Tony Boyer stated in his book about all cases need to be the same so carbon from a shorter case doesn't trap the release of a longer one. Fred Sinclair made mention in his 10th edition about using all the available length but only to gain more neck on the case. The bullet should be engaged in the rifling by the time it clears the case and the rifling shouldn't allow tipping from being uneven as a crown would do. I would still want them square just for consistency. This IS a good question to ask.

 

[Uthink Uknow]

Forster makes a fine, accurate hand cranked trimmer. They also sell a motorizing kit for that trimmer. When properly used - properly used - the motor driven Forster works well. It is important that one sets up the Forster so that it trims to the demanded length each and every time. It's a simple matter to do that.

 

[jonbearman]

I have 2 graceys and they hold a thousandth easily.

 

[BoydAllen]

The reason that I prefer a Wilson to the ones that use a pilot was that back in the day when that was what I had, I noticed that the trimmings used to get between the pilot and the inside of the case neck, and mark it. Designs that do not use a pilot avoid the problem. One quick, inexpensive way to trim is to use something like a Possum Hollow trimmer in one of those power adapters for a deburring tool (They are the same diameter.) Just grab a case with a gloved hand and shove it into the spinning trimmer, giving it a twist as you make the cut. This can be done pretty quickly. Here is a video that I came across on this method.http://www.youtube.com/watch?v=n4_QaEusPFg
There are other trimmers that can be used in a similar way.http://www.youtube.com/watch?feature=player_embedded&v=_KNOLN0ByH8

 

[Dans40X]

6 to 1 or 1/2 dozen to the others-

Pilot type
Pilot less
Micrometer type
Power type

Any machine is only as good as the set-up & operator's "FEEL"

 

[brian427cobra]

I use a Giraud, it chamfers and trims a case in less than 3 seconds, I can tell by the sound of the Giraud when trimming is complete, I don't measure trimmed cases any more, there all within a thou. BTW I don't shoot BR, yet.

 

[thefitter]

I think a important question would be- which is more important, the measurement from the base to the end of the case or the shoulder to the end of the case?

I have both the Giraud and the Wilson.

 

[Erik Cortina]

I think a important question would be- which is more important, the measurement from the base to the end of the case or the shoulder to the end of the case?

I have both the Giraud and the Wilson.

If you know what you are doing they should both be the same.

 

[thefitter]

I think a important question would be- which is more important, the measurement from the base to the end of the case or the shoulder to the end of the case?

I have both the Giraud and the Wilson.

If you know what you are doing they should both be the same.

Yes I remember your opinion on this topic.

http://forum.accurateshooter.com/index.php?topic=3768201.0