300 WSM Build

[Tyman]

Going to buy a Kelby Atlas Lite action- If I purchase a short action, do I have enough COL with a Watts extended mag box? or should I just build it on a long action. Trying to build a light pack hunting rifle. Thanks in advance for any help!

 

[nksmfamjp]

How long is the inside of the magazine? IMO, the 300WSM is ideal with 180-200gr bullets which seat well to about 3.0" OAL.

If you are wanting monos, going lighter, say 180 max is an option.

Be careful, there are older match reamers setup for 1000yd but and 210's seated to about 3.15" out there.

For reference, SAAMI is 2.83", I believe.

 

[BAKPAKR]

How long is the inside of the magazine? IMO, the 300WSM is ideal with 180-200gr bullets which seat well to about 3.0" OAL.

If you are wanting monos, going lighter, say 180 max is an option.

Be careful, there are older match reamers setup for 1000yd but and 210's seated to about 3.15" out there.

For reference, SAAMI is 2.83", I believe.

If my math is correct, the 181 Hammer Hunter would take a little over 3".

 

[Rick Richard]

I have a Wyatt's box on a Defiance SA on my 300WSM and I can barely get a round to fit when set at .30 OTL. Obviously, I can seat shorter but the .030 is the sweet spot for the Berger 180 grain projectile. Also, the Center feed will provide the longer OAL over the Stagger feed.

So, either go with a XM or Long action in my opinion for any WSM round.

Good luck

 

[Tyman]

How long is the inside of the magazine? IMO, the 300WSM is ideal with 180-200gr bullets which seat well to about 3.0" OAL.

If you are wanting monos, going lighter, say 180 max is an option.

Be careful, there are older match reamers setup for 1000yd but and 210's seated to about 3.15" out there.

For reference, SAAMI is 2.83", I believe.

Thanks for the info man I really appreciate the help.

 

[Tyman]

I have a Wyatt's box on a Defiance SA on my 300WSM and I can barely get a round to fit when set at .30 OTL. Obviously, I can seat shorter but the .030 is the sweet spot for the Berger 180 grain projectile. Also, the Center feed will provide the longer OAL over the Stagger feed.

So, either go with a XM or Long action in my opinion for any WSM round.

Good luck

Looks like I am going to be building off a long or medium action lol. Thanks for the info! Really new to all of this and the rabbit holes are deep

 

[rgvt4]

following

 

[nksmfamjp]

Have you considered a round with better brass selection?

 

[Beluebow]

Another vote for a long action. No need to hamstring yourself right off the bat. IMO

This barrel has a .215FB and this is a Berger 215hhybrid .028 off touch.

 

[Tyman]

Have you considered a round with better brass selection

I haven't I have a Proof sendero lite 22" barrel carbon fiber that I got from a buddy of mine. That's my starting point so I figure the 300 wsm was my best option

 

[Rusty85]

Have you considered a round with better brass selection?

I don't know how much better you can get than ADG. I've got one throated for 215's and it's one of the most accurate rifles I own. Seated at the lands is 3.2"

 

[Beluebow]

Norma, ADG, Bertrum in that order accuracy wise for me.....the ADG and Bertram is gonna take more powder.....WSM brass is tough as boot.

Bertram is in stock here..... https://bertrambrass.com/shop-1/ols/products/300-wsm-winchester-short-magnum

 

[Rick Richard]

Norma, ADG, Bertrum in that order accuracy wise for me.....the ADG and Bertram is gonna take more powder.....WSM brass is tough as boot.

Bertram is in stock here..... https://bertrambrass.com/shop-1/ols/products/300-wsm-winchester-short-magnum

Big + for Norma.

 

[FEENIX]

I have a Wyatt's box on a Defiance SA on my 300WSM and I can barely get a round to fit when set at .30 OTL. Obviously, I can seat shorter but the .030 is the sweet spot for the Berger 180 grain projectile. Also, the Center feed will provide the longer OAL over the Stagger feed.

So, either go with a XM or Long action in my opinion for any WSM round.

Good luck

THIS!