131 Blackjack vs 135 Berger

[Ross1147]

Just wanted to post this up if anyone was curious on how they compare. Overall they look pretty similar, with the BJ (on the small sample size I took) being ~.002" longer.
In my 25SST the CBTO measurement to the lands was 2.180" for both bullets. I have a ladder loaded up with N565 and the 135 I'm going to test this weekend. Loaded with a .002" jump COAL on the 135 Berger is 2.858". That would put the COAL at the lands right at 2.86". I'll post my results when I get back!

 

[cb4128]

Nice! Was wondering this the other day, look forward to seeing your results!

 

[Korhil78]

Man…what scratches your brass up so bad?

 

[Ross1147]

The lips on the Wyatt's extended center feed. Guess I could polish the lips a little. I only use the mag when I'm hunting and the brass cleans up in the tumbler. I had just cycled it to make sure there were no issues because it's the longest coal I've ran so far.

 

[matt_3479]

Looking very forward to see your results. I'm mainly a Berger guy but I'm so happy with the blackjacks I figured I'd never look else where, until they dried up

 

[lancetkenyon]

Did the same testing last week. Shows a great deal of promise. Looking forward to seeing the OPs results too.

135 LR Hyb (L) vs 131 BJ (R)

My second charge weight after cleaning my barrel and so the first 3 were basically foulers.

Took them both out to 200 and think they show a ton of promise for almost zero load development. About a 1" difference in POI, and velocities are almost identical.
135s @ 3127fps over 54.5gr RL23
131s @ 2126fps over 56.5gr H1000

 

[Liddy]

What twist are you all running in your 25 SST's?

Liddy

 

[lancetkenyon]

1:7.5" in mine.

 

[Liddy]

1:7.5" in mine.

Perfect, I just received my 22" Proof 1:7.5 and ready to send to AxisWorks for my 25SST. I think Ross 1147 might be using a 1:7tw.

Liddy

 

[Ross1147]

Liddy,

Yeah, 22" 1:7tw.

Ryan

 

[Peter K]

I'm very interested in these as well, as I'm really close to having a 25sst built!

 

[lancetkenyon]

Perfect, I just received my 22" Proof 1:7.5 and ready to send to AxisWorks for my 25SST. I think Ross 1147 might be using a 1:7tw.

Liddy

Eric at Axisworks built mine too. Freaking laser beam.

 

[DJ Fergus]

The lips on the Wyatt's extended center feed. Guess I could polish the lips a little. I only use the mag when I'm hunting and the brass cleans up in the tumbler. I had just cycled it to make sure there were no issues because it's the longest coal I've ran so far.

I've got a few Wyatt's CFEs and they scratch my brass also but I can live with it cause they are way smother cycling than a staggered feed.

 

[Bud LaRoche]

Which has more baring surface 131ACE or 135's?