After doing some 25/50 yard accuracy testing with my Ruger 10/22 Take Down, I found group size changed if forearm touched the rest - https://www.thehighroad.org/index.php?threads/bulk-22lr-sorting-by-weight-and-rim-thickness-for-accuracy.850634/ So I gifted the Take Down to my sister/BIL for my nephew/niece to shoot and bought me a 10/22 Collector #3 from PSA for $199 - https://palmettostatearmory.com/ruger-10-22-22-lr-mans-best-friend-collector-series-rifle-od-green-31115.html I decided to do something different with this 10/22 which was to shoot it out of the box without any cleaning/lubing to see how many rounds it would take before needing a cleaning/lubing. The break-in was done with Federal 36 gr CPHP (Walmart 550 round red box) and Winchester 40 gr CPRN M22. Over 500 rounds were fired without issue on range trip #1 and #2 which were mostly fun plinking at cans and steel plates. (10/22 was left factory stock with no adjustment made to receiver bolt tension) On range trip #3 today, I decided to do some comparison ammo testing at 25 yards. To test "real world" plinking accuracy where targets are often shot with hot barrel, 60 rounds of Federal 36 gr CPHP (Walmart 550 round red box) were shot as fast as I could reload the magazine. I got following 6 ten shot rapid fire groups on the left using Bushnell Trophy 3-9x40mm (These groups are more consistent and smaller than groups I got with my Take Down using Federal 36 gr CPHP - I was actually happy to see these groups even though group size increased slightly as barrel warmed). 25 yard 10 shot group ammunition comparison: The 10/22 barrel has not been cleaned since new out of the box and sufficiently warm from 60 rounds of Federal 36 gr CPHP, I continued with ammunition comparison: Aguila 40 gr CPRN - Smaller group produced than Federal 36 gr CPHP was anticipated as Aguila 40 gr Lead and CPRN have consistently produced second smallest groups after CCI Blazer 40 gr Lead RN in my Take Down. Armscor 36 gr CPHP - Group size was fairly consistent with what I got with Take Down. Not bad for less than $16/500 shipped copper plated 22LR ammo (cheapest ammo tested). Winchester 40 gr CPRN M22 - This was a pleasant surprise as Take Down produced erratic larger than Federal 36 gr CPHP groups. Federal 38 gr CPHP (275 round field pack) - I was very happy to see the smaller group with the heavier 38 gr CPHP. With my Take Down, groups I got were comparable to Federal 36 gr CPHP. Federal 36 gr CPHP (525 round blue box) - This is from a case box I bought last year and was also happy to see as group size was smaller than my Take Down. Federal 36 gr CPHP (550 round Walmart red box) - I wanted to do a hot barrel comparison and decided to shoot a magazine of Walmart 550 round that I used as reference. To my surprise, hot barrel produced smaller group with 7 rounds in a small cluster. Encouraged by group sizes I got so far, I repeated the ammunition comparison with now hotter barrel (groups on the left): Aguila 40 gr CPRN - Group opened up a bit but I was still happy with the group size. Armscor 36 gr CPHP - Group size was slightly larger but still not bad for sub $16/500 shipped cheapest ammo. Winchester 36 gr CPHP (555 round box) - I got this to compare with 40 gr CPRN M22 ammo. Remington 36 gr CPHP Golden Bullet - I read many reviews of this bullet producing small groups and group produced was promising. Federal 36 gr CPHP (550 round Walmart red box) - Happy to see group size remaining consistent as barrel temperature increased. Federal 36 gr CPHP (525 round blue box) - I always thought Walmart 550 round red box was same as 525 round blue box but the larger groups maybe due to different lot of powder as Walmart 550 round red box is from newer lot bought this year. And final ammunition comparison groups (groups on the right): Federal 36 gr CPHP (550 round Walmart red box) - This might be the smallest group yet for Walmart red box at just over one inch. Federal 38 gr CPHP (275 round field pack) - I was extremely happy with the small group size until one low shot. Still, very happy with the group size. Winchester 40 gr CPRN M22 - Group size opened up compared to previous group. Winchester 36 gr CPHP (555 round box) - Group size decreased compared to previous group. Remington 36 gr CPHP Golden Bullet - Group size decreased compared to previous group. Aguila 40 gr CPRN - Smallest group of the day. Armscor 36 gr CPHP - Smallest group for Armscor 36 gr CPHP.