Which .308 chamber for 155gn projectiles

[wilson85]

This one is mainly for the TR and F Standard fellas. What chamber (palma 95, Bisley 150 etc) are people running in their .308s? I am using HBC projectiles but might go over to Bergers in the future.

[Barry Davies]

Clymer M852. with 150 thou freebore.
This chamber will handle any projectile from Sierra 2155 thru the Berger 155 range to a 175 sierra.
Originally designed for a 168gn Sierra.
I also had a barrel chambered with what was supposed to be an M852 but it only had 70 thou freebore and would not chamber a Winchester factory round -- so take care to check freebore. I have my suspicions as to whether it was actually an M852.
Not sure about the B150 ( Nev Maddern uses this ) Nothing wrong with it but it has less freebore than an m852 -- would be suitable for the 155 range.

[wilson85]

Thanks for the reply Barry. I was looking at buying my own reamer so I know exactly what chamber I'm getting each time I get some barrel work done. I was looking at the Bisley 150 reamer. I shoot TR, so I'm sure it will be good for 155gn projectiles.

[Longranger]

For 155gn projectiles the Palma 95 with 0.055" freebore is a sound choice.

[KHGS]

For 155gn projectiles the Palma 95 with 0.055" freebore is a sound choice.

Excellent choice, any fired cases you have will need to be put through a small base die before the first use in a '95 chamber, the base of the '95 reamer is a little smaller than SAMI spec. Bear in mind this chamber will not suit Australian factory ammo!=D>
Keith H.

[cheech]

Bisley 150 chamber is what I have in my Archer , actually Keith done the work , lost count what it's won over the years , it worked very well with HBCs and also the bergers - extra freebore allowed lessened pressures with the Projy seated out further compared to others in our club

[KHGS]

Bisley 150 chamber is what I have in my Archer , actually Keith done the work , lost count what it's won over the years , it worked very well with HBCs and also the bergers - extra freebore allowed lessened pressures with the Projy seated out further compared to others in our club

The B150 is also a good choice, it works very well with Nozler CC & HBC bullets. Berger 155.5 bullets are fine in it.
Keith H.

[Longranger]

For 155gn projectiles the Palma 95 with 0.055" freebore is a sound choice.

Excellent choice, any fired cases you have will need to be put through a small base die before the first use in a '95 chamber, the base of the '95 reamer is a little smaller than SAMI spec. Bear in mind this chamber will not suit Australian factory ammo!=D>
Keith H.

That hasn't been my experience with the '95. Standard dies work fine with minimal sizing and consequent working of brass. That was with a PTG reamer though.

[KHGS]

For 155gn projectiles the Palma 95 with 0.055" freebore is a sound choice.

Excellent choice, any fired cases you have will need to be put through a small base die before the first use in a '95 chamber, the base of the '95 reamer is a little smaller than SAMI spec. Bear in mind this chamber will not suit Australian factory ammo!=D>
Keith H.

That hasn't been my experience with the '95. Standard dies work fine with minimal sizing and consequent working of brass. That was with a PTG reamer though.

The problem I refer to occurs with sizing cases shot in a SAMI spec chamber to fit a 95 chamber. New cases shot in a 95 chamber are fine with std dies. Std FLD do not always size fired brass back to new unfired case size, unless the die is on the small end of tolerance, a small base die is required to ensure brass fired in a non 95 chamber is sized back enough to fit a 95 chamber otherwise you may suffer sticking cases.
Keith H.