Zpacks 60L pack question

I have a bv450 and it carries just fine inside the 60L Arc Haul.  I also have the dual top straps option (which I highly recommend) and that can carries nicely on top. If your base volume is low, I suspect you could carry a bv500 inside with no problem, but think you would be happier carrying it on top. Either way you should be fine.

Base volume isn’t much, I have a flycreek ul2, thermarest neoair xlite, and feathered friends vireo. I figured I can put the flycreek on the bottom straps or in the side pocket and the neoair in the other side pocket. I’m able to scrunch my bv450, neoair, vireo, jetboil minimo, down jacket, change of clothes, and 3l of water in my current 45l Patagonia ascensionist.

I used a Garcia bear can and, with low pack volume, I carried it internally in my Arc Haul.

My wife carried a BV500 on top of her Arc Blast 60L. She only had the one top strap and it was  pretty fiddly. We would have to stop when it started slipping and readjust.

She could’ve carried it internally but she didn’t want to wrap it in a piece of clothing to protect against internal abrasion of (D)CF.

In hindsight, a second top strap would’ve been nice.