Can someone help a loop noob please?

I'm not a loop kind of guy but I want to use some 3rd party (from 99sounds) atmosphere drone loops.
They all play fine in preview but some of them stutter when placed on the timeline.
My project is set to 24/48 which is exactly what the loops are...any thoughts?
FWIW, changing my buffer from 512 to 1024 made no difference.
Also, how does one adjust the volume while previewing clips in the browser...I half-ass looked around but can't seem to be able to find it.
Thanks very much,
Randy
EDIT: after closing and opening the project whenever I drag a loop to the timeline it shows up waaay down the timeline (ie measure 900). This is when trying to drag to the now time at around m. 100

Go to preferences, Audio Data and uncheck Always import broadcast waves at their timestamp, this should stop them from importing way down the timeline.  I use the same project settings as you, and have no stutter problems with loops, so can't help with that.

Mesh- The volume can be adjusted in the Preview Bus (in the Mix View).
 
Hmmm...I can't find a "Preview Bus" in Console View or TV.
That said, I may have deleted it long ago and the setting has carried over all these years.
Can you tell me how to get it back? 
 
shawker- Go to preferences, Audio Data and uncheck Always import broadcast waves at their timestamp, this should stop them from importing way down the timeline.
 
Thanks bud, that seems to have resolved that issue 

If you create a bus and call it "Preview" it will show as an option in the media browser dropdown menu (when you click on "Audio Preview Bus").
 
Grum.

The Grumbleweed
If you create a bus and call it "Preview" it will show as an option in the media browser dropdown menu (when you click on "Audio Preview Bus").
 
Grum.

You must be talking about a dropdown I'm just not seeing Grum...all I see is the dropdown with "audio library", "MIDI grove clips" etc (after adding the bus).
Can you be more specific por favor?
EDIT: oops, sorry I finally found it