Accurate lists OAL of 223 Remington with a 55 grain V-max as 2.260".
Honestly just use the 748 load data for 55 grain bullets. I know that everyone here has a different amount of reloading experience but the weight of the bullet is far more important than the specific profile of it. You are going to reduce the load to 90% and watch pressure signs as you work up anyway right?
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New gun, same ol' shot.
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