Snowpeak PP700 transfer port

[Loki_762]

I recently bought a PP700 SA that originated in Canada. From what I understand, to get my gun up over 500 fps in .22, I’m going to need to drill out the transfer port. Is there any tutorials on how to find it, how to get to it, and how big to drill it out to?
Thanks,
Chris

 

[MrP]

Jefferson state air rifles sells / used to sell replacement breech blocks for a reasonable price with different size transfer ports, all of them larger than the stock transfer ports. You can buy one in 22 or .177. They are well-made and even have a little groove designed into them to assist with pellet loading, an improvement over the original design.