"better" is a relative term. if you are going for pure performance out of two custom guns, and not caring about brass, factory ammo, ect then the wby wins.
when you consider everything else, like others have said, even in a custom gun i think the rem mag is the better choice. especially if you get a custom from someone like Rbros. I know his chamber is getting the 180s going around 2900-3000. thats pretty good. I like the idea of being able to get factory ammo if i should need it, and the rem mag has more available.
the one thing most haven't mentioned is that most of the wby mags come in slower twist barrels (at least the ones from wby) than what factory guys are coming with in the rem mag. thats one of the reasons i got rid of mine. it shot 140s to 160s great, but the 1:11 twist (i think the newer ones are a 1:10) wasnt going to get the 180s going. I have a 1:9 rem mag now.
when you consider everything else, like others have said, even in a custom gun i think the rem mag is the better choice. especially if you get a custom from someone like Rbros. I know his chamber is getting the 180s going around 2900-3000. thats pretty good. I like the idea of being able to get factory ammo if i should need it, and the rem mag has more available.
the one thing most haven't mentioned is that most of the wby mags come in slower twist barrels (at least the ones from wby) than what factory guys are coming with in the rem mag. thats one of the reasons i got rid of mine. it shot 140s to 160s great, but the 1:11 twist (i think the newer ones are a 1:10) wasnt going to get the 180s going. I have a 1:9 rem mag now.