Greetings. I acquired a 30 year old Howa 1500 in 7mm Rem Mag. I upgraded to oryx chassis free float, Timney 2stage drop trigger to try &increase accuracy with Arken SH4, 6-24X50 but barrel life is exceeded. I have 600 rounds + just after acquiring it groups were 1-1.5 MOA at 100 yrds and now all over the place , 4-5 MOA at 100 yards not accurate or consistent either ! The action is smooth wondering if I should throw down the $ for a heavy varmint barrel, blueprint action to finish the build with the old Howa 1500 action or go with a new Tikka T3 X Tac A1 in 6.5C.? I’m looking to reach out to 800+ yards but don’t know if this old action & new heavy stainless steel barrel could have the potential of a tikka? Thank you!! Apologies for the length here.