Building a .284 - Ackley or Sherman?

jpfrog

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Well, the time has finally come. I am going to build a light weight, full custom rifle. I only have factory or semi-custom rifles so far, and I've always wanted to take the plunge, so now seems good! I will be using this for packing/carrying, specifically, packing/carrying at altitudes where those gorgeous and elusive elk are known to roam. Weight is being considered, and with a scope, I'd like to keep it as close to or under 8 pounds as possible.

I know it will utilize a Stiller Predator Long Action with a standard bolt face and sit in a Manners EH3. Jewell is my favorite trigger, but my smith has me thinking hard about a Trigger Tech he seems to really like lately. I know it will hold a Proof Research Sendero Light 1-8" twist barrel finished at 24". Probably also a brake. I also plan to shoot Steve's (@RockyMtnMT) Hammer Hunters, so went with an 8 twist so I can shoot his 169gr or 177gr Hammer Hunters. It'll probably also be topped with either a VX-5HD in 3-15x44 or a VX-6HD in 3-18x44.

Easy- done, right? No. I have decided I want to give the .284 cartridges a try because I don't have one yet. I have .243win, a couple of 6.5 offerings (6.5x47, 6.5-284), a .270win, a couple of .30 cals (.308win, .300win mag), and a .338 Lapua. The challenge is to find something that gets me slightly more than my trusty 9-ish pound .270win, which I pretty much use exclusively for Texas whitetail deer and absolutely love, and my .300 win mag, which is amazingly accurate but weighs about 14 pounds scoped.

All that said- I'm obviously missing a 7mm from my lineup, so I bought the Proof barrel. I know the .280 Ackley Improved has done quite well for quite a long time, and has helped to revolutionize the way cartridges are looked at by the big manufacturers. Nothing about the .280 AI is bad, from what I can tell anyway, and there are even some decent factory offerings and decent brass availability. All of THAT said, this guy Sherman (@elkaholic) came along and made my choice difficult. I like the looks of his 6.5 Sherman but I wanted a 7mm. Easy, until I saw he also has a 280 Sherman. Darn it!

I hand load everything, but in the past have always gone with a chambering I could also acquire factory ammo for in a pinch if something were to prevent me from using my hand loads. I have never done a wildcat before, but the Sherman line seems fairly straight forward, no?

So there's the question- Sherman or Ackley for my .280 build? Please educate me with your views on performance, brass availability (I know Sherman hooked up with ADG- are they supplying for the 280?), barrel life (this will be a hunter only, so minimal annual use), cost of dies (I like Redding Bushing dies, but open to others).

Thanks in advance, and thank you for sticking through this long post!
 
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I believe the Sherman cases based off the -06 case all utilize the 280/270 as parent case due to furthest forward shoulder. Best brass available for these would be rws, norma, or Winchester. They're as aggressive as you can get on the -06 based case. You pick up 4gr capacity I think vs the ackley 280. Have to neck up, then down to get a crush fit on shoulder then fire form to have a case prepped. For ease of simplicity, I'd shoot the 280ai off nosler brass, just load and go. It's quality brass as well. You might get another 100fps with the Sherman vs the ai. I'd go 26" barrel to get the most out of either case.
 
if you want factory ammo and brass 280 ackley all the way
fun of wildcatting and making your own ammo and brass 280 Sherman
for my money wildcatting all the way
Rich has all dies available on his website and is extremely helpful to his customers give him a call
 
Don't go any slower than the 8" twist.

I just made my decision on exactly the same build. Other than mine is on a factory win action. I chose the saami 280ai. Only reason is everything I ever do is a wildcat. Wanted one that wasn't this time. I think you should go with the Sherman. I think you will get the best performance of any cartridge on a standard bolt face. Since you are going full custom it makes sense to go with a custom cartridge.
 
Steve- did you go with a sub 26" barrel? I'm thinking 24-25" to keep it lighter and shorter for carrying. Do you think I'll suffer on velocity? I'm thinking those Hammers of yours at around 2800- 3000 fps would be decent medicine, no?
 
Well, I guess you know my choice!:D
Here is one thing to consider. The Sherman with a 24" would equal the A.I. with a 26".
I figured you would say Ackley...;)

The 24" performance of the Sherman really appeals to me. You have any 280 Sherman brass coming out with ADG soon, or what do you recommend for making my own? The brass prepping steps are the only thing that scare me about wildcatting...not sure why that scares me though. I probably read online somewhere that it should.
 
I went with a 22" barrel. My goal was not to get as much as possible out of this rifle but to build a light weight 700y big game rifle. I went with the 8" twist sendero light at 22" plus a small PK brake. The 8" twist will allow me to run up to our 177g Hammer Hunter, but my intent is to run the 143's at about 3150fps. If you go with the Sherman at 24" I would expect to see the 143's running pretty close to 3300fps.

All parts are in and getting put together as we speak and I still go back and forth on the chambering. Other part of my decision is we already have the dies and own the reamer. Rich did offer me to use his reamer which just made it harder to decide.
 
I figured you would say Ackley...;)

The 24" performance of the Sherman really appeals to me. You have any 280 Sherman brass coming out with ADG soon, or what do you recommend for making my own? The brass prepping steps are the only thing that scare me about wildcatting...not sure why that scares me though. I probably read online somewhere that it should.
It just takes a little extra time. Once you have 50 done you are in great shape for a long time with a hunting rifle.
 
I would neck 270 RWS or Norma up to 30 cal and the neck down partially with the Sherman die to form a false shoulder. Then load up a moderate load and fire away.
 
I would neck 270 RWS or Norma up to 30 cal and the neck down partially with the Sherman die to form a false shoulder. Then load up a moderate load and fire away.
I have probably asked you before. Do you do the cow method. I like it.
 
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