Standard .284 Win chamber (dumb) question

[Downeast]

I'm thinking of ordering a pre-fit barrel for a Savage rifle in .284 Win. Will a standard .284 Win chamber work with 180 Bergers?

 

[DaveTooley]

Yes any bullet will work. Will it the best fit for 180's? Probably not. Ask for the reamer specs.

 

[Downeast]

Yes any bullet will work. Will it the best fit for 180's? Probably not. Ask for the reamer specs.

Thanks!

 

[Dusty Stevens]

A standard 284win chamber will be centered around a 140-150gr normal bullet

 

[tobnpr]

Won't work with bullets that heavy...SAAMI spec chamber has no freebore...
About to do one for myself with a PTG "match" reamer but will still need to throat it after to about .225 freebore from what I've read.

I don't see this particular chambering as a good, "off the shelf" choice for a prefit. If it's what your chamber of choice is on a Savage, might as well order a reamer ground to exactly what you want insofar as neck (what brass? turn/no turn?) and freebore.

 

[FeMan]

I agree with the above posts. Ask for the freebore or reamer specs. You will want a freebore somewhere around 0.200 to 0.235 for the 180's.

 

[Brandon_M]

Here is Dave Manson standard 284 reamer

 

[284winner]

I'm thinking of ordering a pre-fit barrel for a Savage rifle in .284 Win. Will a standard .284 Win chamber work with 180 Bergers?

Not sure where your pre-fit barrel is made or coming from but many pre-fits and companies that offer .284 chambered barrels, chamber them with "match" reamers that may acomodate the Berger 180s. Not sure what the freebore spec is on "match" chambers but it's definitely longer than a saami spec chamber for sure. The standard Saami spec was designed for a short flatbase bullet in the 150 class range when the .284 was designed for semi auto loaders. Made to fit in a magazine (2.8").

 

[Downeast]

I called Criterion (?) and inquired about their "match barrels" and the gentleman told me that they were cut to take 180 Berger's. I'm not sure about the quality of the barrels though. But they fit my budget. ​

 

[std7mag]

Won't work with bullets that heavy...SAAMI spec chamber has no freebore...
About to do one for myself with a PTG "match" reamer but will still need to throat it after to about .225 freebore from what I've read.

I don't see this particular chambering as a good, "off the shelf" choice for a prefit. If it's what your chamber of choice is on a Savage, might as well order a reamer ground to exactly what you want insofar as neck (what brass? turn/no turn?) and freebore.

Hate to disagree with ya, but....

The standard SAAMI 284 Win has a really long freebore!
Remember it was originally chambered in Winchesters model 100 semi auto.
Long freebores were the order of the day to keep pressures down.

I screwed an E.R. Shaw barrel on a commercial Mauser & used a SAAMI reamer to set the headspace.
Using a 160gr Sierra HPBT GameKing touching the lands is barely in the case neck.

You MIGHT be ok with 180s.
But if it doesn't shoot, switch over to Sierra's.
Don't waste your time & money if the Bergers don't shoot!

 

[WAMBO]

I called Criterion (?) and inquired about their "match barrels" and the gentleman told me that they were cut to take 180 Berger's. I'm not sure about the quality of the barrels though. But they fit my budget. ​

I have a Criterion 284 match barrel on my Savage PTA action, for me it shoots very well for the $1000 I have invested in just the rifle.
I have shot 4"-6" 5-shot groups at 1K in good conditions.
I shoot the 180 Berger Hybrid at .050" off the lands and the boat tail/bullet shank junction is well above the shoulder/neck junction of the case.
It would still be above that if they were seated at the lands.
Hope this helps.

 

[Downeast]

Thanks Wambo! That helps a lot and makes me feel a bit better about the rifle and the barrel. I picked up a NIB Model 12 Target rifle at about half the price. It is chambered in 6.5-X 284. I already have .284 dies and brass and I hate to buy another set of dies and brass. I would rather put that money on a new barrel. I'm not sure what to do with the 6.5 X 284 barrel? From what I've read I may get 2000 rounds out of the .284 and half that with the 6.5 (???)

 

[WAMBO]

Sell the 6.5 barrel, someone will want it.
I've had a few 6.5x284's, they'll go 1000-1200 rds before accuracy falls off, still shoot sub moa but not .5 moa or better.

 

[Dusty Stevens]

One thing to remember is a 284 was designed to be in a short action. That means saami length with something like a normal 140gr bullet will be short action length. My experience must be way different than others- with a factory reamer it pretty much has zero freebore to make it as short as possible. 2.8” is max oal so youll quickly realize even those brick bullets are into the powder column

 

[Alex Wheeler]

The standard reamer is a 0 freebore with about a 3/4 degree lead so it will seem about like a .045-.050" freebore that your used to.

 

[Edd]

If you compare a SAAMI 284 reamer to a reamer that has a .2845" diameter parallel freebore, the SAAMI reamer has the space in front of the bullet equivalent to a .19605" freebore.

The tapered throat on the SAAMI chamber has a diameter of .2845" at a length of 2.3948".

 

[Alex Wheeler]

I did forget to take into account that the saami starts at .290". A degree in a lead's half angle is worth about .060" or so in seating depth from my experience. But the increase in .0055" starting diameter is a little beyond my math skills.

 

[Edd]

I did forget to take into account that the saami starts at .290". A degree in a lead's half angle is worth about .060" or so in seating depth from my experience. But the increase in .0055" starting diameter is a little beyond my math skills.

https://www.rapidtables.com/convert/number/degrees-minutes-seconds-to-degrees.html


http://www.carbidedepot.com/formulas-trigright.asp

 

[59FLH]

Dusty's right.

 

[Stan Taylor]

I have a .319 neck and .195 freebore for 284 Winchester reamer.