I’ll definitely have to try it out, it shot decent out of my b14R and now I’ll have to try it out of my rimx. Only thing that might be a little issue is the fact it’s a match chamber cut for Lapua/SK ammo, so I’ll probably get a bunch of engraving with a tight bolt closure.
I was in almost the same situation about a yr and a half ago. I had a B14R carbon, and a new Rim X with a Bentz chamber. My B14R liked SK+ and SV and some expensive ammo at 50 but not 300 yards. The Rim X really only took to Center X, no Ely in this test.
So, I took a caliper to different ammos, and my conclusion was chamber too, the B14R likes longer ammo. In retrospect, I think my findings were misguided.
Fast forward to now and a new MW 13tw barrel on the Rim X with an Eley match chamber, with full expectations of running Center X through. I had 12 lots of Center X to test, and some Eley Team and Match. Blah, blah, only one lot of Lapua Long range and 1 lot of Eley Team shoots well so far. Digging further, these ammos run fast out of the barrel compared to all others.
Again, I take a caliper to ammo, even buying a 20 cal comparator insert, which was stupid because the nose of the bullet touches nothing, learn as I go. I measure a bunch of ammo, my conclusion between SV and SK-Lapua ammo is, Lapua's band is slightly bigger in diameter and longer than SV's, though reamer has to play somehow, I just don't know what exactly. I ran an engraving test by chambering and extracting both Eley and Lapua ammo and my eyes could not see a visible difference.
The B14R is long gone, but it shot SV well to 300 yards, on non windy days. Right now I have a Kidd 20" barrel on a 10/22, same thing, shoots SV really well to 300 on non windy days, 8 mph of wind and performance drops off fast. Justin nailed this aspect, a simple examination of ammo quality reveals quite a bit, and the bullets are in way better shape with Lapua brands. This last paragraph is all I bring to the table here.
You paid a lot of money for that Rim X, feed it decent ammo! When you were young and got all peacocked out to go chase pussy, you surely didn't leave the house with a hefty as your goal.
On the OP, I have tested SK HV match in at least 8-9 rifles, and it never disappoints, it sucked in every rifle I have tried. I am sitting on 2 bricks of the shit and cannot wait to run into some mouth breather that preaches the virtues of it so I can give it to him and then give him a shooting lesson. I have 4 bricks of Norma Tac 22 that may suffer the same fate.