Weird injection problem

Hi all,
 
I'm coming to the end of my current cycle and as always I have switched to test prop for the last few weeks.  However, this prop seems to be causing a rather unsettling problem when injecting.
 
Basically, I draw as normal, taking 1.5ml of air and injecting this into the vial, then drawing 1.5ml of oil from the vial.  However, once the oil is in the barrel it seems to knacker the rubber in the barrel and it makes it very, very hard to press the plunger.  The first time this happened i thought it was a once off but it has just done it again, and even when I transferred the oil from 1 broken barrel to a fresh barrel it broke the new one!
 
 I assume that the oil it having some effect on the rubber stopper and causing the mechanism to freeze, but does anyone know what is happening and is the prop safe to use?!? 

Had same before with a UG lab preparation mate, sure it is to do with the solvent in the Prop affecting the rubber on the plunger. Mine was with 5ml barrels so switched to 2.5ml ones and the smaller surface area made the shot easier for me................

What size barrels are they? 
Bigfella.

I'm already using 2.5ml barrels.  The first time it was literally so hard to press the plunger that it felt as though something was pushing back and I had to give up after about 1/4 of the oil left 
 
Pretty gutted about this actually as I have another 3 weeks worth of ****ty jabs ahead of me.  I guess the moral of the story is to stick with the brands you've used already and **** like this is avoided!

Bad news mate! Are you running anything else with the Prop? Diluting it with another AAS should help. Also have you tried warming it a bit? Sometimes helps (didn't with mine though LOL)
 
Bigfella.

have you tried with the oil at different temps? i.e: if you warm the vial up normally then try it at room temp. if you usually use it at room temp then try warming it first.
 
dunno if it'll work but worth trying!

How do you go about warming your vials / amps?
 
Is a warm water bath a suitable technique?

Buy barrels without the rubber in future!

Sawdust


Buy barrels without the rubber in future!

Yes what sawdust says. The blue ones from medisave are very good and more accurate!