• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

6 dasher norma brass

finally got the bolt easily to close after trimming to 1.564
how much more should i trim off of that? .005, .010?

Bought A 6 dasher from Lonnie Anderson a couple of years ago and I am just getting around to shooting it.



Thanks In advance
John Hiller
 
I have read on this forum an opinion that less clearance helps in the prevention of a carbon ring. I cannot verify this personally. It seems to me that with very minimal clearance a person would want to stay on top of his cleaning regimine to make certain there wasn't a carbon ring forming. I use a brush and Iosso for this purpose. Hopefully someone will chime in with a proven recommendation.
 
finally got the bolt easily to close after trimming to 1.564
how much more should i trim off of that? .005, .010?
Do you have a way to measure your actual chamber length? If you can establish this, the recommendation I have seen is 0.015 clearance.
There was an article in the March 11, 2018 Daily Bullitin on how to measure your chamber. http://bulletin.accurateshooter.com/2018/03/how-to-craft-your-own-chamber-length-gauge/ Or you can buy a Sinclair gage.
Gary
 
Do you have a way to measure your actual chamber length? If you can establish this, the recommendation I have seen is 0.015 clearance.
There was an article in the March 11, 2018 Daily Bullitin on how to measure your chamber. http://bulletin.accurateshooter.com/2018/03/how-to-craft-your-own-chamber-length-gauge/ Or you can buy a Sinclair gage.
Gary
Edit: I didn't mention that I measured my chamber at 1.584 and trimmed the Norma brass to 1.570. I only trimmed 25 pieces so I can see what it does after being fired. Sometimes the neck will get shorter and sometimes it will get longer. Depends on how much the body expands.
 
Be careful with that “tool”. The front of your chamber is beveled and depending on your neck diameter in relation to the OD of that plug, your measurement can end up a fair bit longer than what you think you’re measuring.
The shouldn't be beveled much. All the reamers I've seen cut them pretty square. They get pretty beat up after a while though:
Screen Shot 2018-12-11 at 6.51.06 AM.png
 
Last edited:

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
166,352
Messages
2,217,126
Members
79,565
Latest member
kwcabin3
Back
Top