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Which Size Powder Bar on Dillon RL550B for 300 BLK?

I am just getting started to reload and I am wondering if anyone uses a Dillon RL550B to reload 300 BLK and if so, which size powder bar you use. When I called Dillon to tell them what I was reloading, they told me I needed a large powder bar and I currently have a small powder bar.

The Dillon owner's manual states to use the large powder bar whenever possible. It also states that the small powder bar is for dropping 3 to 20 frains of powder and that they large powder bar is for dropping 20 to 45 grains of powder.

From the reloading data I have looked at the powder measurements are close to the end range of the small bar and the start range of the large bar.

I am curious if anyone uses the Dillon RL550B and which powder bar size you use.

Run powder through both bars and see which one gives you the most accurate drop.

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