240 gibbs and vld's

[dirtball]

Will the 6mm 105 and 115 gr Bergers hold up at the velocities generated by the gibbs or are the jackets too thin? , was thinking about a 1-7 twist. How about Richard Graves 6mm 120gr rbbt, is he using a heavier jacket? Does any one recomend a groove-twist rate, was not planing to shoot anythig lighter than 105gr.

Thanks
Dave

 

[Buffalobob]

Here is a thread that is pretty informative.

http://www.longrangehunting.com/forums/f19/6mm-115-grn-vld-20720/

 

[dirtball]

Here is a thread that is pretty informative.

http://www.longrangehunting.com/forums/f19/6mm-115-grn-vld-20720/

Thank you very much. That was very informative. It would seam I need to give more thought to exactly what bullet selection I intend to use, before I order a barrel.

Thanks Again
Dave

 

[Craig Dodd]

I don't know just how much more "thunder" the 240 Gibbs has over a 6x284, but I am driving 105 Bergers at 3275 in a 1:9 twist Cooper 6x284 with no apparent problems. However, the barrel is new and is smooth as silk; no problems with the Bergers...

 

[dirtball]

I don't know just how much more "thunder" the 240 Gibbs has over a 6x284, but I am driving 105 Bergers at 3275 in a 1:9 twist Cooper 6x284 with no apparent problems. However, the barrel is new and is smooth as silk; no problems with the Bergers...

Craig
According to one of the reamer rental websites, I think it was 4-d products, which provided case dimensions. The 240 gibbs has about a 7grain additional case capacity over the 6mm 284. I was looking at the gibbs mainly because I picked up a set of standard dies and an S-Bushing die for next to nothing and had been thinking of doing a 6mm in 6-284 0r 6-06ack. But with that extra 7 grains I can burn up the barrel even faster.
Dave

 

[Locknload]

This is an old thread, without an answer. I know the answer, which may help someone in the future.

The 105 Berger VLD will hold together to a velocity of at least 3,870. I have load data for a very similar cartridge to the Gibbs and the data at top end, high pressure, is to 3,870 fps without notation of disentigration or jacket shedding.
Best,
Ed

 

[Mikecr]

Ed, you should qualify your declaration with twist rate.

I'll declare this:
The Berger 105VLD will not survive 3870fps at recommended twist(8tw).
It would survive it only in a very marginal twist(like >9tw).