load data for:9mm 124 grain Unique

[Whirlwind06]

I just bought a bunch of Berry's plated 124 gn 9mm.
Looking at my reloading book (Lee's) It lists loads for 125 grain unique but not 124 grain. Can I use the 125 grain starting loads? Doesn't seem to me that there could be that much difference in loads for 1 less grain of bullet weight. But I wanted to ask the experts.

Thanks

 

[wally]

Generally using starting loads for heavier bullets with lighter bullets is fine.

I've used 4.7 gr Unique with 9mm hard cast lead 124gr truncated cone flat point bullets from a variety of sources for many years.

--wally.

 

[Walkalong]

125 Gr data will be fine. Start in the middle of the jacketed data and work up.

 

[bp78]

I've been loading the 124gr Berry's HPs with 4.5gr of Unique. So far, the HPs just don't feed well in my 1911 no matter what OAL I use so I'll be going back to a 125gr flatpoint that's worked well for me.

 

[wally]

I'd start with the minimum load for cast bullets, don't know how hard Berry's plated bullets are inside, or if the plating is close to the jacket hardness or not.

Are they sized .355 or .356? If .356 definitely start with the cast load numbers. If .355 maybe I'd try the jacketed bullet starting load if not more than 0.5 gr above the cast starting load.

--wally.

 

[Whirlwind06]

Thanks
I bought berry's round nose double struck, this time around.
I had 115 Gn flat nose. They worked fine but I was always worried I was setting the OAL to low. Ended up using HP OAL numbers then added a bit more for safety.

 

[Whirlwind06]

I'd start with the minimum load for cast bullets, don't know how hard Berry's plated bullets are inside, or if the plating is close to the jacket hardness or not.

Are they sized .355 or .356? If .356 definitely start with the cast load numbers. If .355 maybe I'd try the jacketed bullet starting load if not more than 0.5 gr above the cast starting load.

I would have to mic them to tell you the size. (at work right now)
Berry's web site says to use low to middle range FMJ load data. As long as they are below 1200 fps they will be ok.
Their website say they are .356

 

[Walkalong]

I agree with bp78. The Berry's 124 Gr. HP's are finicky feeders. I shoot the Ranier 115 Gr. RN using jacketed data all the time. I have not shot the Berry's, thus my advise to start in the middle and work up. Plated don't act like lead or jacketed bullets, but usually, USUALLY, jacketed data is fine. I start in the middle and work up, usually stopping a bit short of max, but not always. I am shooting the 115 Ranier at max with WSF, AA# 5, and N330.