Do competition winners lube their slugs?

[sactargetshooter]

How does wet lube compares to dry lube? Thanks in advance for any advice!

 

[RangerPete]

You dont get dieseling in a pcp by coating projectiles. Dieseling happens when petroleum products get compressed enough to cause it to ignite. You are not compressing air at the chamber of a pcp rifle. I dont like petroleum products for lubing projectiles in case it degrades the barrel oring or probe oring.

If a springer pushes a pellet out at 900fps and a pcp can push the same pellet out at 900fps, I.e. they both generate the same amount of pressure behind the pellet, how is it possible that u can get dieseling in the springer but not the pcp?

 

[zer0dev]

Heat is generated when you compress the air, ie when the spring piston is released when firing. In a pcp, already compressed air is only released (expansion), and that actually creates a lower temperature, like how using a can of compressed air gets cold.

 

[thomasair]

Put in a heavy slug and a flammable lube....and a pcp will diesel. I can get some dramatic boosts in speed....along with some smoke coming out the barrel using heavy slugs.

Mike

 

[zer0dev]

Interesting... seems counter intuitive though. Maybe initial rise in pressure behind the projectile? Probably not heat from friction...

 

[thomasair]

It's the rise in pressure behind the slug. If I push the slug a couple inches into the barrel it will be far more prone to diesel.

 

[LDP]

Put in a heavy slug and a flammable lube....and a pcp will diesel. I can get some dramatic boosts in speed....along with some smoke coming out the barrel using heavy slugs.

Mike

I could see where that could create dieseling. If you stall the movement of the projectile enough its going to happen.

 

[dgeesaman]

If a springer pushes a pellet out at 900fps and a pcp can push the same pellet out at 900fps, I.e. they both generate the same amount of pressure behind the pellet, how is it possible that u can get dieseling in the springer but not the pcp?

Springer internal pressures are very peaky. PCP pressures are far more even. So to produce the same projectile energy the PCP is doing it at much lower peak pressure.

 

[SEBroz]

I use 10wt Team Associated 100% silicone oil.

Never thought of this before. Ive got a couple bottles of various wts and bet there's at least 1 10wt. Have you used other heavier or 5wt with success?