The days of widely available bolt action military rifles are long gone but the rifles are still out there and available.... though not ~cheap~ like they were in the 60s or even the 80s and 90s.
I haven't owned every kind of bolt action rifle there is but I've owned more than a few and some are better shooters than others. Some rifles are singular in their capability and some are collectively superior. This is my short list of upper end rifles that deliver superior accuracy with cast bullets. All these rifles below deliver exceptional accuracy with cast bullets. Feel free to share your military bolt rifles that deliver exceptional accuracy with cast bullets. I have many more rifles than just these below but none of them will out shoot these rifles.
Swedish m/1896 Mauser. Not all Swedes will deliver superior accuracy. Generally the better condition barrels will provide the best accuracy. I shoot .266" and .268" diameter from 140 gr to 150 gr. Five shots into one hole is a very good day. But you must learn to inspect the bore with due diligence. With j-type projectiles don't waste your time with anything other than IMR4831 and Reloder22. The Swede loves slow powders with j-type bullets. With cast bullets Unique & 2400 are my favorites.
Swiss Schmidt-Rubin 1896/11 & 1911 and Swiss K31. These rifles have excellent quality barrels but IMO they fall second to the Swedes in accuracy potential and delivered. But they are beautifully made rifles and wonderful shooters but if you're going to shoot a match pick the Swede m/96.
Argentine m/1891 Mauser rifles 7.65x53. The 1891 can have barrels with SJG stamped on the side of the barrel shank which is actually SIG for Swiss Industrial Company. Yep, some of these have Swiss barrels and those Swiss barrels deliver superior accuracy to include even bettering the m/1909 Argentine rifles made by DWM in Germany.
Finland m/1891 & m/39 with "B" barrels. Stamped on the barrel shank these barrels are said to be Belgian-made. All are dated 1942 but it is said they were rebuilds from post-WW2 and put into storage. These B-barrels are superior in every way to a standard Russian-made or Finn barrel. These are five shots into one hole shooters.