Setting #104 stainless steel rivets with cap

[Parott1]

I have stainless steel #104 rivets, but I can’t seem to get them to set with a nickel cap.  I contacted weaver and they said the stainless can be used with the cap and to use the nickel plated steel caps.  Anytime I try to set one it ends up crushing like a tin can. 
 

the rivet press might be part of the problem due to the anvil being slightly off center.  I tried to adjust this, but there is no way to accomplish this as far as I can see.

if anyone can give me tips that have accomplished setting the #104 rivets with caps, it would be greatly appreciated.  I will attach some pics for reference

[mike02130]

Hammer instead of press?

[Grihm]

If you cannot center it, i´d go with a shorter rivets. Shorter rivets is less likely to distort as much, even if you are pressing in an angle. 

[fredk]

On 5/30/2021 at 1:13 PM, Parott1 said:

the rivet press might be part of the problem due to the anvil being slightly off center.  I tried to adjust this, but there is no way to accomplish this as far as I can see.

If the top of the anvil is plain, I would grind it down flat so that the head and stem can be put in vertical alignment with the ram