Peter, Both these rounds are soft points that will work in a tube magazine. I prefer the Remington Core-Lokt in my lever action tube fed rifle. Both are safe in tubular magazines.

Peter, yes Sir both use "Tube Magazine Safe" Flat Point bullets as pictured here : google.com/search?q=25+20+soft+point+bullet&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjgh7r5rfHiAhWjc98KHbY_BRsQ_AUIESgC&biw=1280&bih=596#imgrc=1SF_DB2RufwPQM:

Both of those are a standard soft point pointed ammo here is one that should work great in your tube mag and is also inexpensive Ventura Heritage 25-20 WCF 75gr SP (flat) Ammo - 20 Rounds venturamunitions.com/ventura-heritage-25-20-wcf-75gr-sp-ammo-20-rounds/