hi, an elderly friend of mine has asked me to renew the spring and washer on a blued .22 premier as he thinks its down on power .before it did anything to it i chronoed it today at 350fps with accupels.. is this low, if so what should i expect to get out of it with new spring and washer ?i am reluctant to strip it down unless i have to as it is completely as new ,a real minter[wish it was mine] ..thanks in advance ..greasemonkey