hard chamber of 300 wsm


PDA






Bobby1shot
March 15, 2007, 07:55 AM
im having problems with closing the chamber on my bolt after reloading im using a new rcbs die and i have turned it down past tdc
whats to try next?
cases have been trimed to2.090 oal is 2.840accubond165gr
the rcbs die is set to there stanards and to there faq standards and they were lubed and empty or loaded its the same hard to chamber brass is 1 time fired rcbs press the rifle is a tikka t3

If you enjoyed reading about "hard chamber of 300 wsm" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!
hagar
March 15, 2007, 08:10 AM
Make sure you lube the inside of your neck, otherwise you end up sizing the case, and then stretching it back out when you pull the case out of the die.

steve4102
March 15, 2007, 08:24 AM
Couple questions..
What type of die? FL or NS

Did you trim brass to length?

Is your bullet seated deep enough?

What bullet are you using and what is your OAL?

Do you have the seating die adjusted so you are not unintentionally crimping thus deforming the case?

Will sized brass chamber without a seated bullet?

If it is a full length die, did you set it up as per RCBS instuctions?
http://www.rcbs.com/downloads/instructions/ReloadingDieInstructions.pdf

Brass history? Times fired and in what rifle etc.

What type of press?

Kimber1911_06238
March 15, 2007, 09:06 AM
check case length, OAL. Short, fat cartridges tend to make working the bolt than long, skinny ones.

The Bushmaster
March 15, 2007, 09:36 AM
Make sure you are triming the case after you have resized/decapped. Not before...

hoghunting
March 15, 2007, 01:56 PM
When reloading the WSMs, the shoulder has to be bumped back or the case won't chamber - as you found out. Raise your ram and screw FL sizing die down until it touches the shell holder. Lower the ram and screw the sizing die down another 1/2 turn. When you now size the lubed case,raise the ram all the way and it should bump the shoulder back to fit your chamber.

nvshooter
March 16, 2007, 03:16 PM
I had this very same problem on my custom-built target rig using a Montana Rifle Company action. I thought the chamber was too short and wanted my gunsmith to lengthen the chamber by one or two thousandths of an inch. After a loud, lengthy argument that almost had us to blows, he turned .015 inches off my Lee shellholder (in three tries of .005 inches each) and we determined that there had to be a gap of .0025 inches between the shellholder and the mouth of the sizing die when the press handle was at its lowest position. We discovered the relationship between the face of the shellholder and the location of the shoulder in the die was wrong when the standard "contact plus 1/4-turn method" of setting dies was used. He turned up a dummy chamber with the same reamer he used to chamber my rifle and we used that to determine the headspace after I fired three rounds. I retained that dummy chamber and use it to verify if my reloads will fit the chamber before they ever go into my gun. I just measure the cartridge length with it in the dummy chamber and I know right off. A properly sized cartridge will give a headspace of .002 inches. To really check, I remove the striker assembly and if I can chamber the round with essentially zero resistance from the bolt turning into locked position, I know it will fit.

I would ask your gunsmith to turn up a dummy chamber with a new or near-new reamer and then you can exactly determine how to size your brass. It's best to use the very same reamer for the dummy that was used to chamber your gun but if that won't work, use a good, sharp reamer. Use a piece of steel about an inch thick and about 1-1/2" in diameter. Drill and ream it for a 0.300 hole, then chamber it to the datum line on the shoulder of the case. You now have a chamber you can hold in your hand. You can use it to set the jump to the lands and to measure the fired length of a case. Once you know the fired length, you can set your dies to size the cases to a red hair or two short and you're in like Flynn.

LHB1
March 16, 2007, 03:32 PM
+1 on probably need to bump the shoulder back just slightly. Screw your sizing die down a little more if possible. It it is already hitting the top of shell holder, file a little off the top of shell holder. Could also file/grind a little off bottom of sizing die but shell holders are cheaper than sizing dies if you grind off too much. :)

Good shooting and be safe.
LB

ps: A little punctuation would make your post easier to decipher, especially that last paragraph.

If you enjoyed reading about "hard chamber of 300 wsm" here in TheHighRoad.org archive, you'll LOVE our community. Come join TheHighRoad.org today for the full version!