300 Wthby load data issue.

[timblevins]

I have a new Weatherby Vanguard in 300 wthby mag and am having issues with the data in the Nosler book.
I'm checking each and every piece of brass for length of 2.825 case length, 3.560 O.A.C L and I can't lock the bolt down after the round is chambered. I have reduced the O.A.C.L down to .50 from the posted data and they are chambering but the bolt will not lock down after the round is chambered on the majority of the rounds.
I am using brand new Redding hunter series dies and reloader as well.
Is anybody having this issue or does anyone have any suggestions as to why this is happening? Brass is new as well and is full length sized.

 

[JMW67]

I have a new Weatherby Vanguard in 300 wthby mag and am having issues with the data in the Nosler book.
I'm checking each and every piece of brass for length of 2.825 case length, 3.560 O.A.C L and I can't lock the bolt down after the round is chambered. I have reduced the O.A.C.L down to .50 from the posted data and they are chambering but the bolt will not lock down after the round is chambered on the majority of the rounds.
I am using brand new Redding hunter series dies and reloader as well.
Is anybody having this issue or does anyone have any suggestions as to why this is happening? Brass is new as well and is full length sized.

Have you tried to chamber a empty piece of brass do not size it before you try

 

[mmacfive]

My money is on resizing.

 

[timblevins]

Have you tried to chamber a empty piece of brass do not size it before you try

Yes I did and it chambers no problem.

 

[timblevins]

My money is on resizing.

I did full length resize the cases and measured each and every one of them.

 

[David Emerson]

A tight neck chamber.Try chamfering the inside of the necks with an 11 degree vld chamfering tool. As it is I am thinking when you seat the bullets it is pushing the very end of the neck out to cause it to chamber hard. When you said a resized empty case chambers easy is this what it leads me to.

 

[mmacfive]

I have a 7STW that rechambers after firing. No matter what the setting of the Hornady full sizer die it chambers very tight after sizing. I had to get a Redding body die to get the right shoulder bump and resize to have it rechamber easy.

we had a 243 once that took 3 different sizer dies before we found one that would make it rechamber easy.

 

[timblevins]

An additional piece of information, I had to reduce the over all length by .050 just to have them chamber with the bolt closing.

 

[David Emerson]

An additional piece of information, I had to reduce the over all length by .050 just to have them chamber with the bolt closing.

A 300 has a very long freebore.If it will fit in the box there is no way you should be hitting the rifling.

 

[timblevins]

A tight neck chamber.Try chamfering the inside of the necks with an 11 degree vld chamfering tool. As it is I am thinking when you seat the bullets it is pushing the very end of the neck out to cause it to chamber hard. When you said a resized empty case chambers easy is this what it leads me to.

Okay thank you for your advice. I'll give that a try and see what happens. I've never had this happen to me on any of the other rifle calibers I reload for.

 

[David Emerson]

Okay thank you for your advice. I'll give that a try and see what happens. I've never had this happen to me on any of the other rifle calibers I reload for.

Let us know if this works. What kind of brass?

 

[timblevins]

A 300 has a very long freebore.If it will fit in the box there is no way you should be hitting the rifling.

David when the cartridge loads I am getting marks from the lans on the bullets. The full cartridge loads but the bolt will not drop ans lock

 

[timblevins]

Let us know if this works. What kind of brass?

IWeatherby brass.

 

[David Emerson]

Maybe you just need to send it back. The 300 throat should measure .3085. Seems the reamer did not get to bore diameter and there is still some rifling in the freebore. Make up a few dummy,s with no primer or powder and take it to who you got the rifle from and explain so the people of weatherby will have something to go by. I realize now and then some things drop through the cracks. The vanguards I have dealt with are usually very good.