Norma 6Dasher Brass

[tclaunch]

Anyone compared prints with 6BR and new Norma Dasher will be pleased to know by running in the BR reamer long, like .050" with a 1.560" chamber will get you your length for the new brass, then run Dasher reamer in and headspace to Dasher. This will clean up all the 30* shoulder and have room for the longer neck. I plan to do this for someone today.

Carry On !!!

 

[rcw3]

Update on Redding Comp Seater Sleeves

We corresponded on the thread about the Dasher seater sleeves in the Redding Competition Seaters we sell and whether they were short inside in the neck area for the new longer necked Norma brass. Originally, I had tried a couple sleeves with the new Norma Dasher brass and they were fine, but after the thread discussion above, I pulled all we had in inventory and checked every one of them and some were short inside (and sometimes by only a few thousandths of an inch).

My recommendation at this point is if you have a Dasher Redding Competition Seater seater you purchased from us prior to this new Norma Dasher brass being released, it should be gone over inside with the new style longer necked reamer (like that Bullets.com sells). No need to deepen the body portion in the seater, just a light working with a newer longer necked reamer should remove only that bit of metal inside to obtain the needed extra neck length clearance in the seater sleeve.

All the new seaters we sell are already longer now in the neck area so there will be no issues with any of the new die sets at all and the new Norma brass.

Robert Whitley

 

[pburr]

Anyone compared prints with 6BR and new Norma Dasher will be pleased to know by running in the BR reamer long, like .050" with a 1.560" chamber will get you your length for the new brass, then run Dasher reamer in and headspace to Dasher. This will clean up all the 30* shoulder and have room for the longer neck. I plan to do this for someone today.

Carry On !!!

Sounds good, but you would have to ensure the neck dimensions of the Dasher reamer are exactly the same as the neck of the BR reamer. Otherwise, would that create a step in chamber neck?

 

[Firefighter]

My 6 Dasher Forester seating die worked awesome, as did my Redding Type S bushing die for full length sizing after being once fired, no extra cost for me after introduction of the new Norma Brass, I'm glad I chambered two new Dashers with the same reamer.

 

[tclaunch]

Sounds good, but you would have to ensure the neck dimensions of the Dasher reamer are exactly the same as the neck of the BR reamer. Otherwise, would that create a step in chamber neck?

I will use smaller ND Dasher in the lengthened 6BR chamber.

This will work to lengthen a Dasher chamber for the new brass as well,

Carry On!!!!

 

[expiper]

Tim,,,,dont forget that when you run a 6BR reamer in an additional .050" it will make the base line even bigger that .4705 +/- a little,,,and "most" BR reamers (and Dasher reamers) are all ready toooo big for this new Norma stuff,,,,the Norma brass will come out of that chamber looking like a fat girl with a muffin top !!!!...Roger ,,,,I dont mind a muffin top on a big gal ,,but dont want one on my brass,,hahaha

 

[swd]

Anyone compared prints with 6BR and new Norma Dasher will be pleased to know by running in the BR reamer long, like .050" with a 1.560" chamber will get you your length for the new brass, then run Dasher reamer in and headspace to Dasher. This will clean up all the 30* shoulder and have room for the longer neck. I plan to do this for someone today.

Carry On !!!

I've done a few odd ball custom chambers this way. I like to turn a gauge about a half thou under the reamers neck diameter with an overall length .010" longer than my brass. I set the initial chamber length using that gauge then come back in with whatever body reamer I'm using.

 

[Kiba]

Update on Redding Comp Seater Sleeves

We corresponded on the thread about the Dasher seater sleeves in the Redding Competition Seaters we sell and whether they were short inside in the neck area for the new longer necked Norma brass. Originally, I had tried a couple sleeves with the new Norma Dasher brass and they were fine, but after the thread discussion above, I pulled all we had in inventory and checked every one of them and some were short inside (and sometimes by only a few thousandths of an inch).

My recommendation at this point is if you have a Dasher Redding Competition Seater seater you purchased from us prior to this new Norma Dasher brass being released, it should be gone over inside with the new style longer necked reamer (like that Bullets.com sells). No need to deepen the body portion in the seater, just a light working with a newer longer necked reamer should remove only that bit of metal inside to obtain the needed extra neck length clearance in the seater sleeve.

All the new seaters we sell are already longer now in the neck area so there will be no issues with any of the new die sets at all and the new Norma brass.

Robert Whitley

Sorry I created more work for you Robert, LOL! I didn't mean to make you pull and check your entire inventory but I'm sure your customers will appreciate it.

Still debating if I should neck turn any of this brass for use with Shiraz's reamer. I've heard reports of 0.269-0.270" loaded neck diameter from a few people now depending on the bullet used. My brass is measuring 0.0125-0.013" neck thickness, I can't check any loaded rounds since my seating die is at the gunsmith for the issue above. Shiraz's chamber reamer is spec'd at 0.272 neck and I've never ran any of my rifles with that tight of neck clearance. For those with experience, is 0.002" neck clearance safe or should I turn down the brass slightly for 0.003-0.0035 clearance? Another option, should I purchase a 0.2735 neck reamer and have the gunsmith open up the neck of the chamber a bit?

This "tight neck" stuff is all new to me, I'd appreciate input from those with more experience. I'm really trying to avoid neck turning, but will do it if I have to.

 

[Sheldon N]

I'm betting that the reamer and the brass thickness are going to work fine for a "no turn" neck. That's what Shiraz/Norma/PTG coordinated this all to be, and it would be a big deal if the standard "no turn" reamer actually required neck turning.

 

[Kiba]

I'm betting that the reamer and the brass thickness are going to work fine for a "no turn" neck. That's what Shiraz/Norma/PTG coordinated this all to be, and it would be a big deal if the standard "no turn" reamer actually required neck turning.

I know that is the intent, but having never run any tight neck barrels before 0.002" clearance just seems a little too close for comfort to me if you happen to get in some bullets that run a little large or some necks that are a few tenths too thick. A few pages back Robert posted his preliminary reamer design and he was specifying a 0.2735"-0.2740" neck diameter which seems more reasonable to me; that's why I asked to get input from others with a lot more experience than me with tight neck chambers.

 

[tclaunch]

Tim,,,,dont forget that when you run a 6BR reamer in an additional .050" it will make the base line even bigger that .4705 +/- a little,,,and "most" BR reamers (and Dasher reamers) are all ready toooo big for this new Norma stuff,,,,the Norma brass will come out of that chamber looking like a fat girl with a muffin top !!!!...Roger ,,,,I dont mind a muffin top on a big gal ,,but dont want one on my brass,,hahaha

I'm just going to never mind the fuss over the virgin brass diameter for now because custom dies are not in the plans. I believe in never getting the horse behind the cart. It will have to work with what's on hand.

 

[roadhunterray]

I shot some of the new brass today. Just a few (6 rounds) to see if all was good. I had loaded 32 gr of RE 15, Horn. A-Max 105 gr CCI 450. (Same load I was using on the Norma BR brass) No chronograph. Slight mark at plunger hole on base face of brass. OAL shortened by .004 to .005 (they were cut to 1.555) at 1.550 to 1.551. Rim dia. measured at .467 to .470. body dia. was at .4725 to .473. Still some radius on outside edge of primer. Slight raised ring at firing pin pocket. (has been doing that with the fire formed BR brass also with same load). I did not shoot for accuracy just fired them. I'll see after I set up on target to see how they group. I had also faced the rims on these to .053 to 054. Brass was to long (head space) bolt would not close at .055 or 056. I faced off rim and shortened neck on 50 rounds. I'm not sure if I want to buy a reamer and pay for a Smith yet. Will see how they hold up first!! Looks good so far!!

 

[6xcshooter]

I shot some new norma brass and found i needed to reduce my load by 1 grain. older lapua loads where to much.

 

[Bmat]

I fired 15 rounds yesterday. Case capacity was 40.5 gr before firing and 41.5 after firing in my chamber. After firing the 15 cases were very consistent dimensionally (much more consistent than hydro or fire formed Lapua) and the primer pockets were the correct size for my go / no-go gauge. Actually tighter than my Lapua brass after one firing. Neither end of the gauge would fit the Norma primer pockets before firing.I have already prepped the cases for the next firing and have used the same dies, seater etc that I have been using. Zero problems other than trimming and turning the necks for my existing chamber.
I did not attempt to tune the load at all - just fired away but did shoot 1 IBS 100 yd target for a 50 3X. Nothing to rave about but good considering the wind conditions and the load being 125 fps off of my tuner setting.

 

[Raythemanroe]

I fired 15 rounds yesterday. Case capacity was 40.5 gr before firing and 41.5 after firing in my chamber. After firing the 15 cases were very consistent dimensionally (much more consistent than hydro or fire formed Lapua) and the primer pockets were the correct size for my go / no-go gauge. Actually tighter than my Lapua brass after one firing. Neither end of the gauge would fit the Norma primer pockets before firing.I have already prepped the cases for the next firing and have used the same dies, seater etc that I have been using. Zero problems other than trimming and turning the necks for my existing chamber.
I did not attempt to tune the load at all - just fired away but did shoot 1 IBS 100 yd target for a 50 3X. Nothing to rave about but good considering the wind conditions and the load being 125 fps off of my tuner setting.

What velocities ?


Ray

 

[expiper]

yes ,,,what vel,,,????,,,,was it 125 fps faster or slower than before,,,??...Roger

 

[Bmat]

yes ,,,what vel,,,????,,,,was it 125 fps faster or slower than before,,,??...Roger

3180, these were 80 gr berger FBs. Normal for me with these is 3300 to 3400. Not wise to run that hard until the case fits the chamber. This is in a 24" 9.5 twist Kreiger 4 groove barrel. Lower velocity was intentional. More pressure next time out.

 

[expiper]

mat,,,thank you for the info,,,I hope you can get the vel. up to where it was before,,,,if you cant without loosing primer pokets we might as well stick with the BR,,,,Roger

 

[Curmudgeon]

Was able to get to range and shoot 20 rounds I prepped with new dasher brass. 10 with varget 10 with 8208. 1 grain less to see if all ejected and functioned properly. 40x action with factory extractor. All ejected properly. Trimmed brass to 1.556, after firi ng brass measured 1.554. CCI BR primers. can definitely add powder. Will load workup to fire next time at range. Hope to have something for match in 2 weeks. 10 rounds is low statistically for SD but included anyway. Used Magnetospeed. Shot at 100 yards. You will have to rotate picture.

 

[tonyb]

Thanks for that report. What reamer are you using, and are you turning necks?

Tony.