Stormin.40
Member
- Joined
- Feb 17, 2011
- Messages
- 477
Have always assumed that I could use the same load data on plated bullets as I do with Lead, at least as a starting point. I recently worked up a light load using 125 grain Lead RNFP bullets, I settled on using 3.4 grains of Titegroup due to accuracy and light recoil. I also have some of Berry's 125gr Plated FP bullets that I was going to load under Titegroup as well but noticed that Hodgon list 4.3gr of Titegroup as the start point for Jacketed FP, that is a HUGE difference with a fast powder like Titegroup.
Why such a difference from Jacketed to Lead? I assume it has something to do with the friction of soft lead to copper jacket but was curious. The 2 bullets in question are very similar in profile and have almost identical OAL, an increase of .5 grains of titegroup from Max. to Min. load is a big difference.
For reference the Hodgon data is listed as follows:
125gr Cast LRNFP - 3.2 -3.8gr Titegroup OAL: 1.445"
125gr Jacketed FP - 4.3 - 4.6gr Titegroup OAL: 1.450"
Why such a difference from Jacketed to Lead? I assume it has something to do with the friction of soft lead to copper jacket but was curious. The 2 bullets in question are very similar in profile and have almost identical OAL, an increase of .5 grains of titegroup from Max. to Min. load is a big difference.
For reference the Hodgon data is listed as follows:
125gr Cast LRNFP - 3.2 -3.8gr Titegroup OAL: 1.445"
125gr Jacketed FP - 4.3 - 4.6gr Titegroup OAL: 1.450"