6bra primer test, which load would you choose?

[Mike Hightower]

While not 6BRA input, in my 6Dasher's over the years when testing 400's -v- 450's, I have repeatedly seen 400's to produce slight velocity increases of 4 to 8-fps over 450's from 105-class bullets from 4895, Varget, RL15, N140, etc powders. But have on occasion pierced 400's, which is why I have used 450's and it's thicker cup almost exclusively.

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Have you had any trouble with the 205M's piercing with Medium to hot loads? I didn't know they were the same thickness as 450's and have been reluctant to shoot them in my dashers. Thanks for the chart also! Good info!

 

[dedeadeye]

In regard to the CCI 400 primers. In 2017 I set a 10 shot world record at Williamsport 1000 yard bench rest club. The record was 3.493 group and score of 100 5X. Load was 31.12 grains of RL15-103 Vapors and 400 primers in a BRA.

 

[BoydAllen]

While not 6BRA input, in my 6Dasher's over the years when testing 400's -v- 450's, I have repeatedly seen 400's to produce slight velocity increases of 4 to 8-fps over 450's from 105-class bullets from 4895, Varget, RL15, N140, etc powders. But have on occasion pierced 400's, which is why I have used 450's and it's thicker cup almost exclusively.

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I thought that the thickness for the 205M looked a little off, so I did a little research and according to multiple sources it is .0225. https://www.google.com/search?clien...UQIHfs2CycQ1QJ6BAg_EAE&biw=1280&bih=773&dpr=1

 

[Evlshnngns]

On a primer test my 6.5cm liked cci400s more than 450s. After two primers let go I switched to br4s, same load shoots great.

 

[dmoran]

I thought that the thickness for the 205M looked a little off, so I did a little research and according to multiple sources it is .0225.

It was likely a "type-o". I updated the chart to 0.225" cup thickness for the 205M

 

[J.d. Popkes]

You have them. Test, use them. Or, why did you buy them? It's amazing what you learn if you actually test things yourself. Seems to be pretty unpopular though.

Someone finally said it!!!!!!

Thank you

 

[NC/Br Shooter]

One of my guns made the switch to 400s.
The other will stay with the 450s. After two tests. It was pretty obvious