280 ackley load info

[Kbaker657]

I know there have been plenty of post but I'm having some trouble developing a load in my newly built 280 ackley improved. I've been playing with 168 and 180 Bergers as well as 162 a max's. I've tried working around several loads I've found on here with no luck. Thanks in advance for any help. The rifle is a trued 700 action with a fluted #5 benchmark barrel in a McMillan stock with a Jewell trigger

 

[Jokostel]

I haven't played with the 162/168 class bullets.... but 140s and 180s.

With my M48 in 280 AI, Im running 57.5 RL17,215, and a 140 Nosler CT 3.340 OAL.. does about 3250.
The 180 load is a Berger VLD hunting, WLRM, 60 I7977, 3.445 OAL... projected velocity is 28-2850. Reason I say that is I was playing with 171 Match Burners, and that was the same powder charge. I was getting 2880 with that.
gun)

 

[Jokostel]

Obviously... If you choose to try those combos start low, work up.gun)

 

[Kbaker657]

Thanks for the info. I don't have that powder you mentioned with the 180's. I had the new barrel put on to take advantage of higher bc bullets it was originally a 1-12 twist lilja that wouldn't stabilize anything much over 130

 

[Jokostel]

The Ackley I have is a 1-9....
I'm having one built that will wear a Brux #5 that's going to be a 1-8.
The 1-9 twist will take a 175-180 in this round... but Im around 3200 ft ASL. Not sure the stability factor elsewhere.

 

[Kbaker657]

My new barrel is a 1-9. Hopefully I can get a load dialed in soon

 

[Jokostel]

The bad thing is, the neck still holds a LOT of that 180. I set it out to 3.445, and it wont fit in the mag well.... however the bullet jump is still a 1/2 an inch.

 

[Kbaker657]

Yeah it does. I would like to find some 175 lrab's

 

[Jokostel]

Thought midway had them...
hmm.
I know of where I can score 1 box of them... sadly, for too **** much $$ though.

 

[Lefty7mmstw]

The Ackley I have is a 1-9....
I'm having one built that will wear a Brux #5 that's going to be a 1-8.
The 1-9 twist will take a 175-180 in this round... but Im around 3200 ft ASL. Not sure the stability factor elsewhere.

Joel, our range is at about 1700 feet asl.... our hunting grounds are between 2500 and 3200 feet asl...

 

[BEEMAN]

I use 168 berger classic hunters and 4831SC out my Cooper.

 

[Kbaker657]

Well I finally got it straightened out. I followed the guidelines from Berger on finding a seating depth and was actually able to use the load from another guy on here. At .050 off the lans I am shooting one ragged hole with 63 grains of retumbo a federal 210m and 168 vld's. .010 off the lans the group was a little over 2 inches

 

[Springville shooter]

I shoot 162 AMax bullets in front of 58 grains of RL-22. Great accuracy and an easy 3050 fps from my 26" Shilen. My gun will take 61 grains without showing pressure at over 3100 but accuracy is not as good.-------SS