There are active discussions of both at sniper’s hide. I’ll repeat from what I’ve read there. The Steiner has a lot of promise but it appears that quality control isn’t perfect, and many people have scopes that don’t track quite right - usually off by .2-.3 mil around 10 mils up. That’s not awful, but not great and people are unhappy. The Mark 6, despite being around longer, appears to be even worse but more erratic - some examples are apparently off by large amounts in their elevation tracking. People are also reporting canted and off-center reticles in both of those scopes. Steiner will at least try to fix it - Leupold has a ridiculous factory spec tolerance for reticle cant (3 degrees if I remember correctly). Search and read up before you buy either one.
I would not buy any high price Leupold, based on both what I’ve read any my personal experience with several scopes (a defective out of the box VX-R, a Mark 4 that had a dusty reticle, got it cleaned and came back damaged from the warranty department, etc.). I think Steiner will eventually be fine but now may not be the best time to try them, at least on the T5 series.
The Burris XTRII, despite being in a somewhat lower price bracket, is getting uniformly good reviews and seems to have perfect tracking and quality control in the samples that SH members are seeing. This is particularly ironic since Steiner and Burris are now related (common ownership, under Beretta) and the XTRII is made in the Philippines while the T5xi is made in the US.
There are also some really good clearance deals right now, particularly on Steiner military 4x range scopes and various Kahles scopes. Check Eurooptic for those deals.
Read this blog post and poke around the rest of the blog. Really good write ups on the selected scopes (only the Mk6 so no head-to-head for your question).
Give Mike Cecil of CSTactical a call 916-670-1103. Knowledgeable and helpful. He carries both of the scopes you list. You may want to consider the NF F1 4-16.
Thanks for the info. I am also in the market for a 3-15 and was wondering why no one is talking about leupold anymore. Heard from a local sniper that they bought two leupolds recently and they wouldn’t track either. Nightforce for me.
Nightforce has been a quality choice for a long time. You rarely (if ever) hear about any tracking or durability issues with them. But you certainly pay enough for the features you get. I’m also not impressed with the Digillum, at least in the sample size of one 2.5-10x42 that I recently had in my hands.
OP, if weight is not an issue the Vortex Razor gen2 3-18x50mm would be an excellent scope for your FN SPR. Or the 4.5-27x56mm. Those scopes are getting flawless reviews on sniper’s hide from basically anyone who’s tried one, and they are in the same ballpark or only a little higher price-wise. They are fairly heavy scopes (46 and 48oz IIRC) but the reviews are glowing on all other aspects.
Austrian maker Kahles is becoming more popular here and their high end scopes don’t tend to be quite as heavy as comparable options. Might be worth a look. Some deals to be had on closeouts of prior generations.
The digilum took me a while to get use to. Now, its almost second nature. I think the trick is to leave it set so it turns on at the lowest red intensity.
The 2.5-10x42 is an amazing scope. Its an expensive scope, but it just works. Everything. Tracking, clicks, parallax etc. There’s something to be said for that.
However, for a .308, I’d want something with more magnification. I’d look at the NF 4-16 or 5-25 F1.