Before anyone asks "Why bother with 357 Sig minor loads?" I use it for comps other than IPSC.
Is anyone else out there shooting minor power factor loads in 357 Sig? I've been loading 4.5gr AP70 and 135gr RN but am getting up to 100fps variation through the chrony (between 900 and 1000fps). I'm not sure if it is just a cheap chronograph (borrowed a mates and can't remember the brand) or if the powder thrower on my 550 is throwing an occasional light charge. When reloading i check the powder every 50 rounds and it's always on the mark and use the Lee FCD, I shoot it out of an Edge with a 13lb recoil spring and it always cycles fine.
I don't get anywhere near the velocity spread with the major loads (6.4gr AP100 and 160gr RN).
Any thoughts / advice / suggestions would be appreciated.
Is anyone else out there shooting minor power factor loads in 357 Sig? I've been loading 4.5gr AP70 and 135gr RN but am getting up to 100fps variation through the chrony (between 900 and 1000fps). I'm not sure if it is just a cheap chronograph (borrowed a mates and can't remember the brand) or if the powder thrower on my 550 is throwing an occasional light charge. When reloading i check the powder every 50 rounds and it's always on the mark and use the Lee FCD, I shoot it out of an Edge with a 13lb recoil spring and it always cycles fine.
I don't get anywhere near the velocity spread with the major loads (6.4gr AP100 and 160gr RN).
Any thoughts / advice / suggestions would be appreciated.
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