Need a Max COAL

[matthewp45]

I need the Max. COAL for the 270 WSM 150 Berger VLD's. Anyone please.

[Hooked_on_Coues]

Entirely depends on your rifle.

 

When I load bergers its not max COAL but max magazine length.

[matthewp45]

Yes every rifle varies but usually all manuals and bullets have a baseline Max. C.O.A.L. I need a starting point.

[firstcoueswas80]

Start at the max magazine length, work in from there.

[matthewp45]

Thanks I am going to start @ 2.86" and go from there.

[GameHauler]

VLD's seem to like to be seated into the lands.

With their hypedermic needle shape you may end up with a single shot riffle

to get them to shoot to their potential.

I would seat to just touching the lands with a light load

then start playing with the charge

[firstcoueswas80]

Some times the VLD's do in fact like to be touching the lands, but not always. My OAL for the .257 wby is 3.360", which is approximately .100" jump TO the lands.. They also shot well at 3.305" so there is a huge guessing game.

 

If I had to do it again, I would run two ladder tests... One to see where the "nodes" are as far as powder charge. Then, I would run a ladder test at the best looking powder charge, changing seating depth in .010" increments.

Next time I have to develope a VLD load, that is how I will go about business.

[crazy4COUES]

Don't sacrifice your bullet seating depth to achive a longer COAL. It will affect you neck tension and pressures. My understanding is you need to be somewhere near the bullet diameter, caliber, with your seating depth. Example .243, 6mm cartridge will need .243" of bullet seating depth. So if you have a longer case you will be able to achive a longer COAL while maintaining the necessary seating depth.