.22 practice day!

I've only been competing in Service Rifle matches for 10 years now, but I can tell you that these matches are won and lost based on the standing stage scores.  That is because it's the aggregate score that counts, not each individual stage.  Even the 50 round four stage matches (standing, sitting rapid, prone rapid and prone slow) are often decided by the standing stage alone, although less so than the 3 stage 30 round vintage Service Rifle type matches which are almost always decided by how well you score in the standing stage.  

It is extremely rare to shoot a clean score (100 ex 100) in standing slow fire, even on the large 3.5 MOA 10 ring targets used for this stage in US Service Rifle matches.  I've still not done it, ever.  And a scope does not really help much here, any magnification over about 4x is detrimental, nothing like watching the scope cross hairs zip across the width of the 8 ring in less than half a second.  

Anyone who tells you they can shoot MOA standing is, well, exaggerating at the least.  I'd estimate that holding a ten shot group within the 3.5 MOA 10 ring is at best a one in a hundred probability for serious competitors.  Yes, sometimes we get lucky too...