Greetings Kiwi-adam,
You should learn quite a bit by shooting the loads you already have. If your top load of 28.1 grains shoots OK and the velocity is acceptable you might consider loading up a small batch for your current hunting needs. This allow you to continue with your testing over the balance of the winter at a less frantic pace. If more are needed they can be loaded with whatever your current best load is at that time. Almost any load will do for goats. I am a bit of a heathen when it comes to load development having given up working up in tiny increments decades ago. An initial load is fired and chronographed somewhere between start and mid. This allows validation of the data for the components and rifle. Next probable max loads are calculated and a small number of loads below and up to that maximum tested. The best of these is further tested to validate the initial results and that's about it.
Regards Grandpamac.
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