X150

That is pretty normal. It does take a lot of heat to get the powder to ignite, but when it does it is a big boom...

I use T7-3f in my side locks for that very reason - it is easier than 2f to start. I really have not had a problem getting it to ignite with Dynmit Noble 1075+ caps even in the cold weather. I have had some problems with other #11 Magnum Caps in the coldest weatherin regular 30f + no problem at all. It does really burn hot, really hot. It will melt pure lead and as Dave says it will probably destroy a cloth patch... not sure I would shoot PRB's with it - really no need to anyway as Pyro and BP will do the job.

I use T7-2f in my inlines and most of the time I am using a 209 cap to start it, and again no problems. The 2f should work in your inline just fine with a 1075+ cap.