Headspace and Walther KK300

[Sundance]

Again, thanks very much.

[RobinC]

I've never had nor heard of headspacing problems with a KK300, ours shoot superbly with RWS R50 or Eley Tenex, and I know people who shoot Lapua with them. They are designed as a very ammo tolerant rifle. We've had two, and I still have one, both before, and now the one I still have extracts and ejects each shot neatly into a 6 in square tupperware box if the bolt is lifted with the same effort each shot, (saves picking up empties!), try that with an Anschutz!

The only time I've seen a KK300 not extract is with an unshot live round and that is because the bullet is stuck in the rifling, but that should be a very rare experience.

We clean our rifles after every shoot with a few dry felts to remove carbon, and wipe out the breach and bolt face, perhaps once a year I give them a good scrub out to remove any lead build up, (whether they need it or not!) this is the recomended Walther cleaning regime.

Walther use R50 for its new Rifle group testing. We have never bothered to batch test, and we both shoot RWS R50 exclusively, and have never had a misfire or failure to extract from either rifle in five years, and we both shoot 5K+ a year.

[tim s]

Does headspace affect extraction and ejection in any rifle? Wouldn't weak springs or claw shape be the likely culprits? Failure to eject an unfired cartridge us due to chamber dimension, which is entirely separate to headspace in .22LR firearms with a recessed bolt face.

[Sundance]

I 'll relay this to my club colleague who has been having the round ejection problems. It's a relief to learn that this is not an inherent issue with this rifle.

Many thanks for putting my mind at rest.

[tim s]

I 'll relay this to my club colleague who has been having the round ejection problems. It's a relief to learn that this is not an inherent issue with this rifle.

Many thanks for putting my mind at rest.

A good clean out of the extractor slots in the breech with a toothpick, and cotton buds dipped in 009 won't hurt. Many shooters are surprised at how much crud builds up in there. As Robin noted, wiping away any crud from the breech and bolt, especially from around the claws, won't hurt.