SQ,
What loaders loft is saying is that there is sort of a fine line when developing your loads. You will become familiar with how different powders behave in different weather. .Typically speaking, the Hodgdon powders are less sensitive to heat (H4831sc, 4350 etc) and the Reloder powders are more sensitive to extreme weather. Some guys develop a hot weather hunting load and some develop a cold weather hunting load due specifically due to this point. For Hodgdon you may be able to develop a load in 90 degree weather and see very little difference in performance in 25 degree weather, but its all relative and you should experiment in all weather conditions.
IMO testing loads in the heat is not a big deal, as long as you compensate by doing a short redevelopment period in the cold, you may find you need to either back off a grain or two, OR increase a grain or two for 'special' conditions. In this respect a chrony is vital.
Also, your brass will become elongated after neck sizing only for approx 3-4 firings, and will find slight bolt resistance upon chambering - this is fine, but keep an eye on your case headspace, if the bolt becomes very hard to close you should bump - if you keep good notes you will know exactly when its time to bump the shoulders again. You can get different tools to measure this which IMO is a good idea, and takes the guesswork out of it.. Some guys who neck size can get 5 or 6 reloads without body/FL sizing , but it just depends on loads etc.
One other point, you should have a target that has crosshairs on it for more exacting results, this is part of the sport of it, the type of target you have does not allow for you to hone your skills. These are all good comments, keep working and be careful,. Best of luck.
What loaders loft is saying is that there is sort of a fine line when developing your loads. You will become familiar with how different powders behave in different weather. .Typically speaking, the Hodgdon powders are less sensitive to heat (H4831sc, 4350 etc) and the Reloder powders are more sensitive to extreme weather. Some guys develop a hot weather hunting load and some develop a cold weather hunting load due specifically due to this point. For Hodgdon you may be able to develop a load in 90 degree weather and see very little difference in performance in 25 degree weather, but its all relative and you should experiment in all weather conditions.
IMO testing loads in the heat is not a big deal, as long as you compensate by doing a short redevelopment period in the cold, you may find you need to either back off a grain or two, OR increase a grain or two for 'special' conditions. In this respect a chrony is vital.
Also, your brass will become elongated after neck sizing only for approx 3-4 firings, and will find slight bolt resistance upon chambering - this is fine, but keep an eye on your case headspace, if the bolt becomes very hard to close you should bump - if you keep good notes you will know exactly when its time to bump the shoulders again. You can get different tools to measure this which IMO is a good idea, and takes the guesswork out of it.. Some guys who neck size can get 5 or 6 reloads without body/FL sizing , but it just depends on loads etc.
One other point, you should have a target that has crosshairs on it for more exacting results, this is part of the sport of it, the type of target you have does not allow for you to hone your skills. These are all good comments, keep working and be careful,. Best of luck.