hubby made a bunch with 124 gr bullets but we couldn?t get as good a group as we did with 115gr factory.
Pinkish -
Ah, now I understand. Here's a plan to derive what you need...
? When you shoot lead, especially lead that you mold yourself, the most important thing is the fit of the bullet into the barrel. Just becasue the bullet dropped from a 9mm mold really means nothing. Without a good fit, the barrel probably started collecting lead, which further degraded any accuracy you had at the start. So the first step is to "slug the barrel" and find out what diameter bullet the barrel wants to shoot. Shooting lead is cheap, but it's a lot more work, which is why most people chasing accuracy will simply stick with plated or jacketed.
? Then you can analyze the barrel's twist rate and come up with a range for optimal bullet weight. At least in the CZ pistols, that happens to fall in the 124gr range.
? Then, since the Evo's barrel is longer, we know that the gun will take advantage of a slightly slower powder than is normally used in a CZ pistol. Look to powders such as VV N340, AA No7, Ramshot Silhouette, Power Pistol, and the like. These are all known accuracy powders with a soft steady "push".
? Then since the exact "load" won't be known, you'll need to shoot within the load manual's suggested range,
starting low and working up to nearly Max Load in small increments... something like 0.2gr. These are known as "incremental loads" or shooting a "ladder". Maybe 6-8 rounds at each increment, each load onto a fresh target from a well supported position. In that way the targets will tell you which load the gun likes best.
It's a lot of work, but the targets don't lie. And it's the only way to find out what your gun likes.
Hope this helps.