load question....

[.444 Marlin]

Ok I finally got some range time in with the .223
The loads I took are..
50gr NBT over 26.0 Varget w/ CCI-400 small rifle 3220fps +/- @ %95 and no pressure problems at all. Shot great. Definatly keeping this load.

60gr V-Max over 25.0 H335 w/ CCI-400 small rifle 3102fps +/- @ %92 no pressure problems and shot great.

But, the 60gr hornady SP's loaded exactly the same as the v-max had problems. Blew one primer out and bulged the center of 2 others. Didn't finish the last 7 rounds but it did shoot good. Not keeping this one.

My question is, why would just the sp loaded the same as the v-max act as if they were loaded so much hotter than the v-max??

 

[.444 Marlin]

Also, all 3 loads were at the same OAL if that has anything to do with it.

 

[TiminTN]

The bearing surface length on the SP must be longer, much longer, and/or heat in the barrel was up there when you shot those.

My guess.

 

[skynimrod]

TEMP?

 

[.444 Marlin]

I dropped the charge on the SP by 1.0gr so ill see what it does.

 

[mr.big]

I bet the vmax is much softer also,,maybe makin it push easier??

 

[.444 Marlin]

Could be. Both are hornady bullets.

 

[TiminTN]

That little Stevens is a shooter ain`t it.....

 

[.444 Marlin]

Yeah it did good on its first outing even tho it was 3/4" groups at 50yr but this was just to get it sighted in good enough for coyotes out to about 200yd. Ill fine tune it when it ain't 98,000* out.

 

[Whelen Man]

The SP is a little less streamlined bullet and at the same overall cartridge length you may be getting into the lands a bit perhaps a bit more with the SP than the V-Max. Hornady shows the same reloading data for both rounds but I notice that they do show the SP loaded to a overall length .050 shorter than the V-Max in their data. Maybe that's it?

 

[.444 Marlin]

The SP is a little less streamlined bullet and at the same overall cartridge length you may be getting into the lands a bit perhaps a bit more with the SP than the V-Max. Hornady shows the same reloading data for both rounds but I notice that they do show the SP loaded to a overall length .050 shorter than the V-Max in their data. Maybe that's it?

Hmm...interesting. I think imma pull the bullets and load them the same as they were but at a max OAL of 3.000" and see where it goes.