Is it me or h110
- Thread starter Dano4734
- Start date
Help just got my Hornady 240 xtp mag hollow points in the mail. Now my lyman has a max load of 28.3 of n110 but the Hornady manual has a start load of 28.4 why? How can two manuals differ so. Now the Lyman just states 240 grain jacketed hp. Is It because the Hornady is a mag bullet
Reloaders occasionally run into large discrepancies in load data, as in this case. The reason(s) for the discrepancies are seldom known for certain since the testing sites and equipment are usually different, as well as some of the reloading components.
In this case I see two significant differences which may explain the discrepancy. First, the Lyman data is based on crusher test results, for which there is no established SAAMI standard. Hornady likely used PSI results to establish their published reloading data. Speer doesn't make a lighter 45 caliber bullet suitable for full power Casull loads, but their 300gr bullet is. Speer and Hornady reloading data for their 300gr bullets correlates well.
Second, Lyman used small rifle magnum primers, whereas Hornady used standard small rifle primers. Magnum primers often raise pressure significantly, especially with some powders in certain cartridges. Of the five reloading data sources I checked for the 454 Casull, only Lyman used magnum primers.
If I was using the 240gr XTP MAG, I would use the primer specified in the Hornady manual and begin with their starting load and work up from there, loading only 5 or 10 rounds at each charge level.
In this case I see two significant differences which may explain the discrepancy. First, the Lyman data is based on crusher test results, for which there is no established SAAMI standard. Hornady likely used PSI results to establish their published reloading data. Speer doesn't make a lighter 45 caliber bullet suitable for full power Casull loads, but their 300gr bullet is. Speer and Hornady reloading data for their 300gr bullets correlates well.
Second, Lyman used small rifle magnum primers, whereas Hornady used standard small rifle primers. Magnum primers often raise pressure significantly, especially with some powders in certain cartridges. Of the five reloading data sources I checked for the 454 Casull, only Lyman used magnum primers.
If I was using the 240gr XTP MAG, I would use the primer specified in the Hornady manual and begin with their starting load and work up from there, loading only 5 or 10 rounds at each charge level.
I use the freedom arms loading from the lee handloading book for the 240 grain hardcast.
Works good.... but be warned.... it's a very stout load.... I would not shoot it out of a Taurus raging bull.
Ruger or Freedom arms only
Also when using heavy loads of slow burning powder especially if it's a compressed load use a magnum primer
Works good.... but be warned.... it's a very stout load.... I would not shoot it out of a Taurus raging bull.
Ruger or Freedom arms only
Also when using heavy loads of slow burning powder especially if it's a compressed load use a magnum primer
Kevin Rohrer
New member
Both were dirty, both burned all the powder, both exhibited a HUGE fireball,...
If you saw a "huge fireball", then all that powder was NOT getting burned, until it exited the barrel and ignited into that huge fireball.
If you saw a "huge fireball", then all that powder was NOT getting burned, until it exited the barrel and ignited into that huge fireball.
