traveling1253
Member
Received my Lyman #49 and a batch of MBC 180gr IDP#5's yesterday. Lyman data has cast bullet data but not for 180gr. They have two loadings for 175gr bullets using Lyman #401043 and Lyman #401638. The given starting charge of W231 is 4.3gr is the same as the charge of HP-38 that I had good results with 180gr RS Berrys plated. Grabbed three samples of the IDP #5's and they weigh between 178.8-179.7gr so as far as bullet weight is concerned I figure it should be safe to use the starting load data for the 175gr Lyman bullets. What has me a bit unsure is the length of the bullets. The MBC bullets are .625" long which is significantly longer than the Berry's(.579") that I have been using. If I seat them to achieve the same 1.126" that has proven to feed and cycle properly in my XDm there will be less space inside the casing which if I understand right will increase pressures. The Lyman data for the 175gr #401043 bullets gives a OAL of 1.125" but I have no idea how long the Lyman bullet is compared to the MBC's. The data for the 175gr Lyman #401638 shows a significantly shorter OAL of 1.100". Opinions,advice wanted.
Thanks
Thanks