Bullet Jump Help.

[shooting charley]

Just wondering if anyone has had this problem and how did they solve it? I have a Ruger Target Varmint in .204 it appears that it has a built in bullet jump? as when i put the OAL gage in and push the bullet in to get a setting the bullet just falls out of the end of the case it will not reach the lands ??, Has anyone had this and how did they get round it.

 

Shooingcharley.

[njc110381]

Being a heavy target barrel is there any chance it may be throated for heavier bullets? If you're using really light ones this can sometimes be an issue because they're not as long.

 

Perhaps try a heavier bullet?

Edited August 28, 2010 by njc110381

[seeker]

To get the length try using your cleaning rod .... mark the muzzle to bolt face length then drop a bullet into the rifling. Slowly push the rod in til it touches the bullet tip. Gap is your max OAL to seat at rifling ... a bit fiddly but it works.

Then you can get an idea of how to solve the rest of the problem!

[kent]

Factory made guns make it intentionally difficult to jamb fit a bullet to the launds as it increases presure. They work on the longest col to SAMMI and give clearance on that length. Don't fret just get the best jumped load

[shooting charley]

Thanks’ for the replies guys,I am working on it.

 

shootingcharley.

[seeker]

Even Factory guns have to conform to SAAMI / CIP measurements or should fail proof . And in mass production a manufacturer would choose to set things between the tolerances to avoid rejecting an item ... yes???

In rifles the tolerances are there but they are measured in 0.001"s and 0.0001"s ... not whole bullet lengths.!!

IIRC, headspace can differ a whole 0.010" from min to max and a barrel bore +0.0002/ - 0.0