I have used the search function and google but have come up with mostly old threads and incomplete info so I hope you can help me.
I will be reloading 9mm Luger with Vihtavuori N340 powder and Hornady 124gr XTP bullets.
These are intended for self defence, so I would like to run them as hot as I can. I don't have a chronograph however so I will be paying attention to overpressure signs and go by the reload data.
Vihtavuori doesn't list the 124gr variant of the Hornady XTP, on top of that, they only list minimum c.o.l., not the maximum.
I have emailed Hornady but they don't have load data for this combination either.
VV has load data for three types of jacketed 124gr bullets with N340:
124gr Lapua FMJ-RN / Minimum c.o.l.: 29,0mm, 1.142” / N340 / Starting load: 4.5gr, 1086 fps / Maximum load: 5.1gr, 1181 fps.
124gr Hornady FMJ-FP / Minimum c.o.l.: 29,0mm, 1.142” / N340 / Starting load: 5.3gr, 1139 fps / Maximum load: 5.7gr, 1214 fps.
124gr Lapua Megashock / Minimum c.o.l.: 28,7mm, 1.130” / N340 / Starting load: 4.3gr, 981 fps / Maximum load: 4.9gr, 1129 fps. (Megashock is a regular JHP-type bullet with rounded ogive from what I have found)
I think the load data for the Hornady FMJ-FP and Lapua Megashock would be the closest to the XTP, the FMJ-FP charge seems surprisingly high though. I think a starting load of 4.6gr should be plenty on the safe side.
I'll find out the maximum c.o.l. for my pistol (Glock 19 gen 4 with 0-4-1 spring) and keep decreasing it till it fits my magazine and feeds reliably. I'll start with 4.6 grain and increase with 0.2gr increments and would like to build up to around 5.4 grain. VV data is known to be very conservative but of course I'll stop increasing the charge if I see any overpressure signs.
Have any of you used this combination of powder and bullet?
What bullet type should I use for a reference for the charge weight?
What charge weight would you recommend for N340/124gr XTP?
And what c.o.l. would you recommend for N340/124gr XTP?
I will be reloading 9mm Luger with Vihtavuori N340 powder and Hornady 124gr XTP bullets.
These are intended for self defence, so I would like to run them as hot as I can. I don't have a chronograph however so I will be paying attention to overpressure signs and go by the reload data.
Vihtavuori doesn't list the 124gr variant of the Hornady XTP, on top of that, they only list minimum c.o.l., not the maximum.
I have emailed Hornady but they don't have load data for this combination either.
VV has load data for three types of jacketed 124gr bullets with N340:
124gr Lapua FMJ-RN / Minimum c.o.l.: 29,0mm, 1.142” / N340 / Starting load: 4.5gr, 1086 fps / Maximum load: 5.1gr, 1181 fps.
124gr Hornady FMJ-FP / Minimum c.o.l.: 29,0mm, 1.142” / N340 / Starting load: 5.3gr, 1139 fps / Maximum load: 5.7gr, 1214 fps.
124gr Lapua Megashock / Minimum c.o.l.: 28,7mm, 1.130” / N340 / Starting load: 4.3gr, 981 fps / Maximum load: 4.9gr, 1129 fps. (Megashock is a regular JHP-type bullet with rounded ogive from what I have found)
I think the load data for the Hornady FMJ-FP and Lapua Megashock would be the closest to the XTP, the FMJ-FP charge seems surprisingly high though. I think a starting load of 4.6gr should be plenty on the safe side.
I'll find out the maximum c.o.l. for my pistol (Glock 19 gen 4 with 0-4-1 spring) and keep decreasing it till it fits my magazine and feeds reliably. I'll start with 4.6 grain and increase with 0.2gr increments and would like to build up to around 5.4 grain. VV data is known to be very conservative but of course I'll stop increasing the charge if I see any overpressure signs.
Have any of you used this combination of powder and bullet?
What bullet type should I use for a reference for the charge weight?
What charge weight would you recommend for N340/124gr XTP?
And what c.o.l. would you recommend for N340/124gr XTP?