First one, are Hornady HAP not the same as XTP?
I’ve read that the HAP are pretty accurate projectiles, so I’d like to pick some up to try. I checked out my Hornady manual, and they’re not listed in the 9mm section, but it lists the 124gr XTP (the HAP are 125gr). The Hornady website makes it sound like the HAP are pretty much an XTP that doesn’t expand.
So I emailed Hornady to see if the load data is interchangeable. They said that I shouldn’t do that because the HAP is sized at .356” (compared to .355” for XTP) and referred me to the Hodgdon website.
Does .001” make that much of a difference? I planned on finding a working OAL and starting low and working up, etc
To add some confusion, my Wilson test target listed the bullet/load used was a 125gr HAP over 5.2gr PowerPistol, which is well within the data for 124gr XTP in the Hornady manual. Also, in the 45 ACP section, XTP and HAP are listed with the same data. But maybe they’re sized the same, who knows
Second, it also seems the RMR MPR 124gr looks promising, but I have no data for it. So, would using published 124/125gr JHP data be advisable assuming my working OAL is the same, starting low and working up of course (or reducing the start charge if the OAL is shorter than published)
Lastly, when you’re establishing your working OAL for your guns, how much deeper do you seat the bullet when you figure out the max OAL? For example you figure the max OAL is 1.14” for that projectile, do you set your dies to 1.13” to allow for variance in projectile size or other variances?
Sorry if these are weird questions, but I don’t really go “off book” much
I’ve read that the HAP are pretty accurate projectiles, so I’d like to pick some up to try. I checked out my Hornady manual, and they’re not listed in the 9mm section, but it lists the 124gr XTP (the HAP are 125gr). The Hornady website makes it sound like the HAP are pretty much an XTP that doesn’t expand.
So I emailed Hornady to see if the load data is interchangeable. They said that I shouldn’t do that because the HAP is sized at .356” (compared to .355” for XTP) and referred me to the Hodgdon website.
Does .001” make that much of a difference? I planned on finding a working OAL and starting low and working up, etc
To add some confusion, my Wilson test target listed the bullet/load used was a 125gr HAP over 5.2gr PowerPistol, which is well within the data for 124gr XTP in the Hornady manual. Also, in the 45 ACP section, XTP and HAP are listed with the same data. But maybe they’re sized the same, who knows
Second, it also seems the RMR MPR 124gr looks promising, but I have no data for it. So, would using published 124/125gr JHP data be advisable assuming my working OAL is the same, starting low and working up of course (or reducing the start charge if the OAL is shorter than published)
Lastly, when you’re establishing your working OAL for your guns, how much deeper do you seat the bullet when you figure out the max OAL? For example you figure the max OAL is 1.14” for that projectile, do you set your dies to 1.13” to allow for variance in projectile size or other variances?
Sorry if these are weird questions, but I don’t really go “off book” much