Trimming - measuring off the base or shoulder?

[holstil]

I am already onboard and have been with pretty much everything he covered in the first two videos minus the keeping the brass .010 short of the chamber mouth.
I guess I did not explain well enough in my previous post's I was trying to make the same point.



Jim

 

[thefitter]

Hostil
If you carefully watch then re-watch the first two videos you will hear how many times your cases need to be fired before they are all stable and uniform.

But Erik said he anneals every time. If you do that why are the break-in firings necessary? High quality unfired cases are not stable?

Once they are stable/uniform it doesn't matter which tool you use as they will now all do the same thing regardless of which method is used.
This is the point Erik has been trying to convey.Listen to what Jack has to say about bumping the shoulders and you'll better understand why it doesn't matter which method you use as they will all come out the same.
Lynn

Thanks

 

[Erik Cortina]

"break in" firings make the brass match your chamber exactly, it's not that brass is not stable, it's just that it doesn't match your chamber as it should.

I anneal brass for neck tension purposes and shoulder bump consistency. When I resize my brass, the bolt (no firing pin assembly) will free-fall 3/4 of the way down. The base to shoulder measurement is the same on all cases. After I trim the shoulder to mouth measurement is all the same, therefore the base to mouth measurement is all the same!

 

[lurcher]

phew those video's were information overload for a hillbilly hunter like me!

In the video where he talks about shoulder bumping he starts by asking who uses an ejector, then moves on to shoulder bump.

I pull the firing pins from my remingtons and check shoulder bump by bolt drop/slight resistance as he describes. I have always wondered if the spring loaded plunger in a remington bolt interferes with that measurement (as far as I can measure, it doesn't affect it markedly), is that why he mentioned ejectors before he started? Should the plunger be removed from the bolt? Should it be removed from the bolt for the jam fir seating depth measurements he describes? (I would assume so?).

 

[FroggyOne2]

I just learned some good stuff from this video, even though I shoot highpower, everything still applies.

http://www.youtube.com/view_play_list?p=7D85822FD9E41FF2

 

[6BRinNZ]

phew those video's were information overload for a hillbilly hunter like me!

In the video where he talks about shoulder bumping he starts by asking who uses an ejector, then moves on to shoulder bump.

I pull the firing pins from my remingtons and check shoulder bump by bolt drop/slight resistance as he describes. I have always wondered if the spring loaded plunger in a remington bolt interferes with that measurement (as far as I can measure, it doesn't affect it markedly), is that why he mentioned ejectors before he started? Should the plunger be removed from the bolt? Should it be removed from the bolt for the jam fir seating depth measurements he describes? (I would assume so?).

The bit I don't get is using bolt drop as a "measurement", it seems like a crude way to measure something to .001" in todays times...maybe it falls into the "everything else is perfect so its valid" scenario.

 

[Erik Cortina]

6BRinNZ,
When I measure using the bolt drop technique, in not worried about how far I pushed the shoulder back as much as I am worried about fit. If it fits properly then I don't worry about the measurement.

 

[lurcher]

So when you measure by bolt drop on a rem action do you remove the plunger or not (I don't). Similarly is it a good idea to remove it when doing seating depth measurements (again I don't). Just interested to know if it's better to remove the plunger.

I was just intrigued by the fact that in the Jack Neary video immediately before he talks about shoulder bump he asks the audience who uses an ejector? he never elaborates on why he asked this question immediately prior to talking about shoulder bumping using the bolt drop method. I had wondered if the plunger was what he was referring to with the ejector question?

 

[mikecr]

I'm sure he was referring to a plunger, which would create a bit of bolt turn resistance/false HS feel potential.