New to shot shell reloading: help with bushings

kastles

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Clinton, Ontario
So I picked up a RCBS Mini Grand years ago and have not used it yet. I realize I need powder bushings and shot bushing but not sure what sizes to get. I will be loading 1-1/8oz #7-1/2 and #8 shot into the new AA hulls and claybuster wads(I may switch to rem STS)

TIA. Matt
 
you will need to know what kind of powder and how fast you want shot to travel . 1 1/8 oz shot bushing . powder you will need more info .
cheers Frank
 
Check the RCBS web site for your reloader and see their chart for bushings vs powder type vs # of grs.
 
Powder bushing charts are just a general guideline to get you approximately where you want to be. Just for that reason, a scale is necessary.

As well, when you first start with newly added powder, and at points there after, its best you go through a few powder drops (not actually loading those shells) and then start weighing. It takes a bit for the drops to level off and get consistent. Once you're comfortable the selected bushing is dropping how much powder you want and is relatively consistent, then you only need to weigh every 25 loads or so just to check.

Other factors like static, temp, and humidity will affect drops. For instance, when you first add the powder to the bottle, you may find you got consistent drops around say 18gr. Then after sitting idle in your basement for two weeks, you go back and its now dropping around 17.
 
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