Brass Sizing Help, 6.5-300 WBY

[lgloutfitters]

Hell to all:

Im hoping some of you veterans and experts read this thread and offer me some insight on how to fix this problem. Here we go...

I have a custom 6.5- 300 WBY magnum built on a Remington 700 action. I ordered factory ammo to get the rifle on paper and I also ordered some new brass to make handloads my self, rifle chambered and shot these well.

After about 3 shots through each case, I realized that they would only be good for 3-4 shots. So, I ordered some once fired brass that came from weatherby brand rifles. I full length sized this once fired brass and attempted to chamber the round. Once fired cases that are not shot from my chamber wont chamber. I am working with a Co-Ax press and redding dies. If i FL size once or twice fired rounds that him shot out of my chamber, there are no problems, chambers just fine. All cases were trimmed to length

I have adjusted my die to both the longest and shortest possible lengths to try and bump back the Shoulder (thinking this may be the issue?) to no avail.

For reference, I took the die out of the press and placed fired rounds from my chamber that were resized in to the die and the once fired from weatherby chamber cases. they both go into the die the same distance

Any help would be appreciated fellas

 

[L.Sherm]

You may wanna have PBike on here make you a die to run through your 1x fired cases on a different chamber, there probably to big at the .200 line from the other chamber to fit yours when they spring back and your Redding die wont size the back far enough.
Send him 3 fired case that come from your current chamber.

 

[MrMajestic]

http://www.larrywillis.com/

go to belted magnums on the side bar...

 

[lgloutfitters]

http://www.larrywillis.com/

go to belted magnums on the side bar...

Thank you, ordered one from him and it is on the way

 

[MagnumManiac]

Interesting, wasting $100 on a die that MAY NOT help.
The easiest way to size a case a little more is to place a feeler gauge under the case head and size, increasing the size of the feeler gauge until a case just fits the chamber and the bolt close with a slight resistance. Then place an additional .003” feeler gauge in there for a .001”-.002” bump.
I have several Weatherby’s, the radius shoulder resists sizing more than traditional shaped shoulders and spring back more.

Cheers.

 

[drags]

Would Redding competition shellholders help? Also if sized new brass works why not use new brass. I have formed brass for a 7x300 wby and used WBY brass with no problems other than split necks after 3 or 4 firings.
Drags

 

[savagedasher]

Stepping down the necks makes the neck thicker depending on the chamber you may need to turn the necks

 

[Zero333]

Stepping down the necks makes the neck thicker depending on the chamber you may need to turn the necks

Absolutely.

I sized 308win down to 7mm-08 and they wouldn't chamber all the way. Turned the necks and all was good.

This was with Winchester brass and necking down from 30 Cal to 7mm is a very small step, and I still had to turn th necks.

 

[Joe Salt]

Like Savagedasher said the necks may be to thick, check the ones that will go back in the rifle, and take measurements! 6.5x300 Wby were usually custom chambers in my day.

Joe Salt

 

[justashooter]

If when your rifle was built they used a ptg reamer it may have cut the chamber to big. I just built the same rifle in 6.5 300 and had the same problem but had no problem with my factory weatherby vanguard. The once fired brass may have been fired in a large chamber also.