JP Enterprises in 6.5mm Creedmoor and Berger 140gr Hybrids...

[thefitter]

Anybody get these to feed?

Thanks

 

[thefitter]

Guess not.

 

[Kiba]

My JP runs the 130 VLDs just fine but I haven't tried the 140 Hybrids. However, based on my experience with the 140 Amax in my GAP10 and JP I'll leave the 140s for the bolt guns-- the 140s are just too hard on the primers trying to achieve decent velocities in the gas guns, especially if your rifle has a .080" firing pin.

Hopefully Berger gets the 130 Hybrid out in another few months, I'm really looking forward to trying that in my 6.5CM gas guns. Until then I'll stick with the 123 Scenar and the 130 VLD.

 

[thefitter]

... the 140s are just too hard on the primers trying to achieve decent velocities in the gas guns, especially if your rifle has a .080" firing pin.

Can you explain that please? I ran a box of factory Hornady A-Max 140 during "break in" and saw no issues.

Thanks

 

[Kiba]

Can you explain that please? I ran a box of factory Hornady A-Max 140 during "break in" and saw no issues.

Thanks

In my experience with both my GAP10 and JP running the 140s there were many cratered primers with both factory loads and hand loads even with mild loads down in the 2650fps range. The GAP10 pierced numerous primers with the 140s even with mild loads and even stuck the firing pin on a primer piece and ran away full auto.

GAP fixed the problem with my GAP10 by swapping to an Armalite bolt which uses a smaller .068 firing pin and the primer condition was substantially improved over the .080 DPMS style firing pin it initially shipped with (JP uses a .080 firing pin too.) However, after more load development I quickly realized that I could get better performance out of the 130s compared to the 140s. A 140gr load that showed mild pressure signs (ejector marks and slightly flattened primer edges) would be outperformed at 1K by a 130 load that showed no pressure signs.

You can try the 140s and your rifle might run OK with them but after working up loads in both rifles with the 123gr Scenar and 130 VLD they were the clear winners compared to the safest 140 load I could come up with. GAP and JP will both recommend sticking with 130s or lighter in the 6.5CM gas guns if you call them.

 

[PSYOPS]

See....my JP in 6.5 creed did not like the VLDs. I switched to the 123 Lapua Scenars and so far, so good.

I ran 140 AMAXs out of my DPMS 6.5 creed and it shot great, but as Kiba was saying, occasionally you would get some pierced primers.

 

[thefitter]

The 140 hybrids just won't feed at all. I talked with JP they suggested trying a pmag instead of the DPMS because of how the rounds angle up and centered on the pmag, or maybe seating the bullets deeper than .280

I personally think it's the VLD shape because the 123 scenars were also at .280 and they fed great. And the factory Amax 140s are loaded to .281

Thanks

 

[thefitter]

In my experience with both my GAP10 and JP running the 140s there were many cratered primers with both factory loads and hand loads even with mild loads down in the 2650fps range. The GAP10 pierced numerous primers with the 140s even with mild loads and even stuck the firing pin on a primer piece and ran away full auto.

GAP fixed the problem with my GAP10 by swapping to an Armalite bolt which uses a smaller .068 firing pin and the primer condition was substantially improved over the .080 DPMS style firing pin it initially shipped with (JP uses a .080 firing pin too.) However, after more load development I quickly realized that I could get better performance out of the 130s compared to the 140s. A 140gr load that showed mild pressure signs (ejector marks and slightly flattened primer edges) would be outperformed at 1K by a 130 load that showed no pressure signs.

You can try the 140s and your rifle might run OK with them but after working up loads in both rifles with the 123gr Scenar and 130 VLD they were the clear winners compared to the safest 140 load I could come up with. GAP and JP will both recommend sticking with 130s or lighter in the 6.5CM gas guns if you call them.

I got ejector swipes with the factory Hornady Amax 140 and the Superformance 129.

 

[Kiba]

I've only ran pmags in my JP, never tried the DPMS mags. If I had some 140 hybrids on hand I'd load a few and try them for you to see if my rifle has the same feeding issues.