Over the last fifty years or so, I've only found a few loads in my rifles that changing primers made a significant difference in accuracy. However, I have found some. That doesn't mean that any particular brand of primer is worse or better, it just means that changing it made a change in the end product. In handguns I've never found any difference unless I went from magnum to regular. I'd try the S&B and see what happens. If they aren't the right one for the load you have you can try "adjusting" the powder charge or simply trade them off or sell them to someone else. They are a good primer and the price is right, so give them a try.
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