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Which .308 chamber for 155gn projectiles
Posted: Sun Oct 09, 2016 12:14 pm
by 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.
Re: Which .308 chamber for 155gn projectiles
Posted: Mon Oct 10, 2016 7:30 am
by 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.
Re: Which .308 chamber for 155gn projectiles
Posted: Tue Oct 11, 2016 11:18 am
by 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.
Re: Which .308 chamber for 155gn projectiles
Posted: Tue Oct 11, 2016 5:41 pm
by Longranger
For 155gn projectiles the Palma 95 with 0.055" freebore is a sound choice.
Re: Which .308 chamber for 155gn projectiles
Posted: Wed Oct 12, 2016 7:45 am
by KHGS
Longranger wrote: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.
Re: Which .308 chamber for 155gn projectiles
Posted: Wed Oct 12, 2016 7:43 pm
by 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
Re: Which .308 chamber for 155gn projectiles
Posted: Wed Oct 12, 2016 9:14 pm
by KHGS
cheech wrote: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.
Re: Which .308 chamber for 155gn projectiles
Posted: Thu Oct 13, 2016 8:11 pm
by Longranger
KHGS wrote:Longranger wrote: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.
Re: Which .308 chamber for 155gn projectiles
Posted: Thu Oct 13, 2016 8:51 pm
by KHGS
Longranger wrote:KHGS wrote:Longranger wrote: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.