I have only owned two LH Win M70 rifles chambered for 7 RM / 300H&H / 375H&H. Both held three rounds down with factory bottom metal.
When converting from 7RM to H&H, I did have to tinker with several different followers to get the feeding right and reliable. But, they always held three down
Lee Christensen (Redneck here on 24HCF) would be an excellent resource if you continue to have issues.
