WSF and .40 HST help [Archive] - Glock Talk

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LanceL1
08-06-2012, 07:54
I acquired some 180gr .40 HST bullets from RMR and they seem to measure about .03 longer than the Zero 180gr jhp I normally load .
I guess due to the larger hollow point cavity or is this just due to the different shape of the nose/ogive and wont effect case capacity for the same oal?
If it will seat deeper in the case if I load to the same OAL 1.125 does anyone have any experience with these bullets or suggestions as to if/how much powder reduction....I normally load 5.5gr of wsf with the zero 180jhp
Thanks in advance
Lance

ColoCG
08-06-2012, 08:47
If you are changing bullet shapes for the same weight bullets and the new bullet will be seated deeper and thus reduce case capacity which will raise your pressure, then you should reduce your powder charge to starting levels and work up slowly.

If I were you I would first load a dummy cartridge with your new bullet and your seating die set the same, then measure oal depending on the new bullets ogive it may or may not be seated deeper than your original bullet. Also test for fit in your magazine and chamber.Then you can decide on whether changes in your powder charge are needed.

fredj338
08-06-2012, 08:52
^^THIS^^ There is no formula for longer bullets or seating deeper. You are changing powders & bullets, start over & work it up.

LanceL1
08-06-2012, 20:00
AOK...thanks much

squirreld
08-06-2012, 20:47
typically a 10% drop and rebuild would be the best thing.
I would start at 5 gr. and work up.

firefighter4215
08-08-2012, 16:38
I actually measured the HST's I received from RMR, and added the difference between them and a 180 XTP to 1.125",and started there. It came out to about 1.150", which is long for a 40 load. However, it dropped freely in the barrels from my G27 and G22, so I decided to try it. For now I'm sticking with the starting load of Autocomp and HS-6, and loading to 1.145". Seems to be working for well me, and I don't have any pressure signs.

fredj338
08-08-2012, 18:22
I actually measured the HST's I received from RMR, and added the difference between them and a 180 XTP to 1.125",and started there. It came out to about 1.150", which is long for a 40 load. However, it dropped freely in the barrels from my G27 and G22, so I decided to try it. For now I'm sticking with the starting load of Autocomp and HS-6, and loading to 1.145". Seems to be working for well me, and I don't have any pressure signs.

Yeah, but does it fit the magazine 4-5 rds down? In semiautos, it has to fit both bbl & magazine.:wavey:

firefighter4215
08-09-2012, 10:33
Yeah, but does it fit the magazine 4-5 rds down? In semiautos, it has to fit both bbl & magazine.:wavey:


Haha. Good point. I should've mentioned that the next logical step was to load that many rounds and see. I went so far as to make a couple dummy rounds, and see if they'd work at the bottom of a full 15 round mag. No problems. Thanks for adding making that point. I've only shot a couple hundred like this so far, but they seem to work well with HS-6, Autocomp, and Longshot. I'm away from my data, but I never came close to a max load for any of them. Not going to experiment in uncharted territory.

hotpig
08-10-2012, 12:14
Are the bullets HST or Hydra Shock? RMR listed them as the same but they are not related to each other.

LanceL1
08-10-2012, 13:07
HST's.......
In the end I was able to load to 1.125 and go with my usual 5.5gr WSF......no signs of pressure that I can see....cases/primers look/feel the same as my loads using the zero 180JHP.
Nice when it works that way :-)
Thanks again for the feedback