The same can be said of any catridge. People shooting big cartridges losing animals always seem to go straight to it was a bad shot but small cartridges they go straight to its the catridge. In all honesty most failures are either bad shots or incorrect projectile and impact velocity matches. Everyone likes to say it will do the job but is not ideal comapred to day the bigger typical hunting rounds but it's undeniable fact most people in field conditions are better with a smaller rifle in field conditions given it increases forgiveness to the poor form 90% of us use. I'd argue a 10% increase in optimum hit rate is better than a 10% increase in killing ability once you get the the sorts of wounds even a 223 calibre fragmenting match projectile will achieve. I'd say if anything the average hunter that shoots less than 50 rounds a year benefits more from a lighter recoiling rifle.
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