,Update) 6XC NORMA 'TUBB' BRASS RANGE REPORT

[Jefhai]

It finally made it. The 6XC Norma "TUBB" brass. Yes I admit I was one of the impatient ones for the past year and half.

Ordered 300 cases. 300 received.
The following is noted as "right out of the shipping box", no prep done. Average case length 1.905,26 cases were varying between 1.900 to 1.909,althought the majority were dead on at 1.905, Neck concentricty on all cases was 0 to .002 runout,out of the box!)No split necks found on any.

Case weight in grains:
300 case count/ Average 157.7
Low 156.6
High 158.0
Considering a few cases were short and long 1.900 to 1.909 the weight difference was expected.

Comments: Quality is on par with Lapua brass and above average. Finish quality, factory trim and chamfer was excellent. No draw die marks indicating above average quality controls in place. Flash hole piercings are clean, sharp and bur free inside and out. Primer seating using Federal 210m's was very firm. No acid pickling stains present as sometimes found on other sourced brass. Headings and web are noticibly more robust over Rem/Win necked up brass.

______________________________________________
At the Range:
8-26-2006
Temp 92
Please note the 6XC Norma brass was straight out the shipping box with inspection only and I felt since I needed to fire form it I did not bother to do any prep at all. The necks were straight enough that since this was the first fire why waste my time. I did not run them through the die even to square the necks. It wasnt needed first time out. I normally pre-prep new brass but it was not necessary.,thanks UPS and David Tubb for his quality demands)

Load
38.0 Grains 4350
Federal 210 Match Primers
Lapua 105 Scenar- Silver Jacket,Moly)
COL 2.690,very slight soft seat,.005)when closing the bolt)

Rifle
Barnard Model P with a 29 inch True-Flite barrel,by the extraordinary Mac Tilton) Mastin Offset Palma Stock, Zeiss Diavari 6-24x56 Mildot.
Target
MR63 placed at 600 Yards,I ran out of 600 Yard paper)
The attached target was fired from the bench using a front sand bag only. A 5-7 mph breeze to the right. 100 shots were fired.

David Tubb,hope your recovery is going well),Brand Cole, Brenda and Bonnie of Superior Shooting have come through!! If you shoot a 6XC call and order the Norma 6XC brass NOW! You will not be disappointed. I am excited and everyone should be.

I am a scrutineer by nature in everything I do. GET THE BRASS !!!!!

Chronograph update: 9-10-2006
Temp: 88
High: 3052.7 fps
Low: 3034.9
SD: 5.5 fps
CV:0.2%
Mad: 4.2 fps
Average Velocity: 3041.2 fps
ES:17.9 fps

-Jeff

 

[Forum Boss]

Jeff,

Thanks for the report. What's your velocity with that load? People have been asking if the Norma brass can take pressure better than the previous 6XC brass.

Also, where are you located in California. Perhaps we could connect some time. I'm in Ventura County.

 

[Jefhai]

I did not Chronograph the load. I was just blowing the cases forward today. The shoulders were .005 shorter than my chamber. I normally fire form, resize .001 setback, full prep and then run the speed tests. Once everything is a glove fit I can obtain a reliable real world velocity. My rifle does not have an extractor plunger so I have to rely on "reading" the primer cups and anvils along with bolt lift for pressure concerns. I did not experience any sticky lift. I did decap some cases and all of the anvils were intact in the cups, no disintegration or separation of the anvils.

I am going to step out on a limb here: I do not rely on Chrongraphs just for velocity but more for deviation in velocity. Deviation and shot grouping can provide a plethora of
feedback information such as ignition issues, consistent neck tension, consistent preparation technique etc. Velocity is a constant variable that changes with temperature, humidity and altitude so its the least of my concerns because it WILL change at every location I shoot.


I should have a chance to Chronograph in the next two weeks. I will post them then.

 

[Jefhai]

Jeff,

Thanks for the report. What's your velocity with that load? People have been asking if the Norma brass can take pressure better than the previous 6XC brass.

Also, where are you located in California. Perhaps we could connect some time. I'm in Ventura County.

Pact printout attached,
Update 9-10-2006
Temp: 88
Average velocity was 3046.9 fps
SD 5.6 fps

This is the 2nd loading of the new Norma/ Tubb brass. Primer pockets still tight.