N/A .177 for slugs (primarily at least)?!

Even at 900 29fpe ain't bad at all for a .177. The higher BC of that slug at that relatively lower velocity, will lend to still very decent energy on target at 100 and further
Yep! I think I’ll set it up to shoot 16gr at 950-960 once I am through the 10gr mk iii (which may take some time though :)). That’s more than enough and I doubt that I’ll actually use it on critters beyond 60-70y, enough .22 and .25 for ranges beyond that. With the 10gr at 970 it’s basically at stock notos power but with the slugs better retention of power down range. And with the Notos I smacked squirrels to 50y with no problems.
 
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Yep! I think I’ll set it up to shoot 16gr at 950-960 once I am through the 10gr mk iii (which may take some time though :)). That’s more than enough and I doubt that I’ll actually use it on critters beyond 60-70y, enough .22 and .25 for ranges beyond that. With the 10gr at 970 it’s basically at stock notos power but with the slugs better retention of power down range. And with the Notos I smacked squirrels to 50y with no problems.
As long as they are accurate down range, you won't have a problem.I've taken iguanas out to a hundred yards with those slugs going nine hundred feet per second out the barrel
 
16.5gr vk 178 970fps

Entry and exitS.

Slug fragmented so hard that slivers of lead came out of the iguana's skull
@RabbitofCaerbannog

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Uragan 2 600 mm .177 - DNT Zulus 5x20

JSB Knockout slug 10.03 grn - 840 fps - hammer spring adjusted 1.25 turns out from stock

42 yards - left to right breeze

Nothing special, gonna turn the reg up a touch, see if I can get to the low to mid 900’s and see how it shoots.

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Even in the breeze those groups could be much better. Given that you're shooting 840 with the 10.03gr you have to be somewhere around 70bar. Was there a difference in speed with the hammer set flush?
 
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