Cheat Engine

[tomsmith]

Hello, I'm currently trying to make a unlimited ammo cheat for a game.
My Goal is to find the instruction which decreases my ammo when i reload, and i manage to find it but everytime i restart the game the instruction bytes and opcode changes.
For example, the first time i found this instruction: 7FFF77DBF462 - F2 41 0F11 3B - movsd [r11],xmm7

I have overwritten this instruction with NOP and it worked, i dont loose ammo but after I closed the game and i looked for the instruction which decreases my ammo again and all of a sudden it's this one: 7FFF382BCC10 - F2 0F11 3A - movsd [rdx],xmm7

I repeated this proccess a couple of times:

7FFF20702EFA - F2 41 0F11 45 00 - movsd [r13+00],xmm0

F2 41 0F11 2A - movsd [r10],xmm5

7FF9DCEA6F8F - F2 0F11 11 - movsd [rcx],xmm2

7FFBECCCEC71 - F2 0F11 28 - movsd [rax],xmm5


"movsd" stays but the Bytes and OpCode always changes.
How should i deal with this?