I have a Rem 700 in 338 with a HS Precision Sendero II stock. I am trying to get other's thoughts on upgrading to a McMillan A5 or Manners T4 style stock for long range prone shooting. This Sendero II is a nice stock but I find I struggle to find a comfortable place for my left hand while shooting. I was thinking the "hook" would help me secure the stock in my shoulder. Thoughts are appreciated. Thanks.