Not sure how commonly this topic is discussed but warming the oil right before pinning is absolute best way to take down the infamous PIP. I use a hair dryer for 10-15 seconds But a lot of others will use heating pad etc.
Big advantages being:
Able to use slin pins for most compounds taking down tissue trauma significantly(absolutely crucial for guys like me that pin Ed on the blast)
Be able to keep nice consistent pressure and not struggling trying to push the oil out.
please share any experiences that may help as well