The Browning 92 is a fine rifle but if you plan on using cast just be aware that their barrels are similar to Marlin microgroove barrels. That's not to say they won't shoot cast but you do you need to treat them much like Marlin microgroove barrels to get the best out of them.
Use as large a diameter bullet as will chamber and feed in the rifle (aim for 0.433-0.434"). Ideally use a hard alloy and a GC. RNFP or TC designs function best. If you follow this formula you will be rewarded with groups on a par with those using jacketed bullets.
Despite the slow twist (1 in 38"), the rifle will stabilise and accurately shoot 300 gr cast bullets. The truth is its not the twist that is the problem, it's the shallow rifling, large groove diameter and the long throat (approx 0.22").
Last edited by JFE; 01/11/19.