@TNSTAAFL - I have just completed my own search for a replacement scope for the Hickory Creek Mini. If you can justify spending $300 - $400 for a replacement scope, I recommend that you go with one of the following:
1. Hawke XB30 Compact 1.5-6x36 SR - Street Price is usually around $270.00 on Amazon.com
Link:
Hawke XB30 Compact on Amazon.com
2. TenPoint Rangemaster Pro 1.5-5x32 - Street Price is usually around $270.00 on Amazon.com
Link:
TenPoint Rangemaster Pro on Amazon.com
3. TenPoint EVO-X Marksman 1.5-6x36 - Street Price is usually around $370.00 on Amazon.com
Link:
TenPoint EVO-X Marksman on Amazon.com
It turns out that TenPoint has Hawke make their scopes and put the TenPoint name on them. All three of these scopes will give you the low-light performance you desire ... they have excellent light gathering capabilities. (1.) and (3.) have the best low light performance of any crossbow scopes I've found. All three scopes also have some highly desirable features for crossbow users:
a) Etched glass reticle, which cannot shift or break like wire reticles can
b) Battery powered
variable intensity red and green reticle illumination so you can easily see your reticle in low light conditions, and fine tune how bright it appears against the image you're viewing through the scope. The ability to adjust the illumination intensity becomes critical as the level of light changes fairly rapidly at dusk and dawn.
c) Multiple stadia lines providing hold points for 20, 30, 40 yards (and further)
d) Arrow velocity indicator scale on the
locking variable power ring, to assist you with sighting in your crossbow. Once you have it dialed in to match the velocity/trajectory of your arrow, you lock the variable power ring so that it won't move if someone tries to turn it or if you accidentally bump it.*
e) 30mm scope tube, which provides better light transmission for low light performance than 1" and smaller scope tubes
f) Nitrogen purged to prevent moisture entry and internal fogging
*Be aware that you don't use these scopes in the field like a variable power riflescope.
The magnification is only used to adjust the spacing between the stadia lines of the reticle during your initial setup, so that they match the trajectory of your arrow perfectly. Once you find that magnification setting (while sighting in at the range), you lock the power adjustment ring and never change the magnification again. In the field, you use the scope as a fixed power scope locked at whatever magnification setting was the correct one for your arrow trajectory. When the HC Mini is set to max draw weight with stock arrows and 100gr heads, the launch velocity is about 320 to 330 fps. The corresponding magnification setting you'll end up at for the associated arrow trajectory is somewhere around 2.5X magnification, give or take a little, depending on the particulars of your individual Mini and arrow setup.
You won't need a chronograph to setup your system. You simply sight in the 20 yard stadia line at 20 yards, then move your target out to 40 yards and shoot with your hold on the 40 yard stadia line. If your arrow hits too high or too low, you dial the magnification power up or down (without moving the elevation setting on the scope) and try again. Once it's hitting the bullseye at 40 yards using the 40 yard stadia line, you can lock the variable power ring in place and you're almost done. Do some final checks to make sure the 30 yard stadia line is "on" at 30 yards and the 50 yard stadia line is "on" at 50 yards just to gain confidence that you've got it dialed in correctly. Once there, you're "done for good" unless you adjust the draw weight or modify the type of arrow or head you're using - then you should go back to the range and dial it in again.
I can say from user experience that these are the best alternatives that I've found to the stock scope provided on the Hickory Creek Mini. I have no doubt that there are
riflescopes with larger objective lenses and even better light gathering capabilities for low-light performance. But if you want a
crossbow scope that gives you exact hold points matched to your arrow's trajectory, these are the best performers in low light that I have found in the marketplace today - and I'm confident that they'll let you take your shot in the last five minutes of legal shooting hours.
I currently have the EVO-X Marksman mounted on my HC Mini, because I prefer the reticle it has over the other two options I listed. All of them have adequate reticles - the one in the EVO-X is just my personal preference.
One final note: If you're going to put a replacement scope on the HC Mini, you need to be mindful of the sweep path of the bowstring in relation to the turrets on the scope. Using a larger diameter scope like the ones I've recommended above requires you to adjust the position of the picatinny rail to the right (on a right-handed Mini) to ensure adequate clearance between the string and the scope turret when firing the bow. Failure to be mindful of this during setup will cause undesirable consequences.
There are two allen head screws that lock the picatinny rail in place on the c-channel on the Mini. It may not be obvious until disassembly of those screws and removal of the rail, but they pass through slots, not holes. Those slots permit you to slide the entire picatinny rail left or right to achieve the string clearance needed for your particular scope. Make sure you get it right the first time. (It's not hard as long as you pay attention.) Attention to detail on this is critical ... You have been warned!