What I would do were I the current owner of a .35 S&W (I did have one long ago, but didn't shoot it much, and I used .32 ACP ammo), is to handload lead bullets in .32 ACP cases to a level not much beyond that required to get positive functioning. But I already have the reloading dies to do that. At one time I had an extensive collection of .32 and .380 US pocket pistols, and reloaded about everything I fired in them. My two favorites were the Remington 51 and the Savage M1905. They sure don't make them like that anymore.