Working up nice sub 300blk hunting load. May have got it!

[Aaronhime27]

Been toying with some new molds and really wanted a good effective shorter range sub 300 for a defense or hunting load. I ordered an MP 311-410 hp mold and worked up quite a few loads for it. Below are pics of the 1096fps load. This was range pick up lead melted and poured with no additions. Was water quenched then pc with Ford blue. I'll have to get some water tests next to see expansion in more hydraulic media. This was just shot into soft sand but it's a good indicator I'm on the right track. Accuracy was only tested at 30 yards or so but produced dime size off lead sled. Ran some supers but accuracy with this mix was poor and the bullet seriously disintegrated in sand. Test powder was what I had on hand h110. Will get some aa1680 to see if it will cycle for next test.

 

[Bowhntr6pt]

What results are you getting sound wise? I would think anything above 1050 would crack.

 

[Aaronhime27]

Although I can't measure sound it is very quite. I have a Witt machine tool SME which does a little to mitigate sound. But at just over sea level where we live it seems the 1050 number doesn't always translate. I've seen discussions mentioning close to 1100 to 1150 even. This is one of the quietest load I've run so far but again this is using h110. I'll do more for sound when I work up the 1680 loads and report.

 

[Bowhntr6pt]

Although I can't measure sound it is very quite. I have a Witt machine tool SME which does a little to mitigate sound. But at just over sea level where we live it seems the 1050 number doesn't always translate. I've seen discussions mentioning close to 1100 to 1150 even. This is one of the quietest load I've run so far but again this is using h110. I'll do more for sound when I work up the 1680 loads and report.

Thanks for the reply.

I use AA #9 and at about 1045-1050 using 200gr and 220gr bullets I get a distinct crack. Is it possible the crack is being masked?

 

[Aaronhime27]

Thanks for the reply.

I use AA #9 and at about 1045-1050 using 200gr and 220gr bullets I get a distinct crack. Is it possible the crack is being masked?

It could have been or the speeds may not have shown correct due to it being very windy that day. But this was extremely quiet as I'd mentioned. Was no crack to report. And this is shooting in a dirt bay where I'd get a little echo. I'll get some video next week when I test some more.

 

[lakelandmusic]

It could have been or the speeds may not have shown correct due to it being very windy that day. But this was extremely quiet as I'd mentioned. Was no crack to report. And this is shooting in a dirt bay where I'd get a little echo. I'll get some video next week when I test some more.

I would venture to say if it's quiet enough for you it's gtg. Interested to see what the 1680 groups produce.

 

[Jester896]

mine will crack in some conditions running about 1050 with A1680

 

[Bowhntr6pt]

I'm at about 1035 with AA#9 with no crack.

 

[Bullet Splatter]

1020-1030 no crack. Ubers had1680 a couple weeks ago if you need it.

 

[Aaronhime27]

It seems these are just to light to properly cycle subsonic. Plus powder is case sensative. But I did start working up supersonic with them. My issue is that I can't for the life of me get them to chamber correctly. If someone would want a hundred or more to try to test these I'd be willing to give them some to work up a load. If we can find a loading for them I'd offer up more in the future for the help given. I haven't abandoned this load but I do have several other I've turned my attention to so I can get a little ammo stored back.. Only thing I'd prefer is the person is local to Navarre, ft Walton, Pensacola area.

 

[Bullet Splatter]

May need to look into 180-240gr for subs. Those 135’s should make decent supers though. What problems are you having with chambering, and what size are they after pc?

 

[Aaronhime27]

Yeah I'd hoped to get away with a lighter bullet. I'm sizing to 309 after pc.

 

[Aaronhime27]

I've got 3 other 308 caliber castings that I run fine. Including subs at 220g. I just for the life of me can't get this one to properly run up the feed ramp. Plunks fine.

 

[lakelandmusic]

It seems these are just to light to properly cycle subsonic. Plus powder is case sensative. But I did start working up supersonic with them. My issue is that I can't for the life of me get them to chamber correctly. If someone would want a hundred or more to try to test these I'd be willing to give them some to work up a load. If we can find a loading for them I'd offer up more in the future for the help given. I haven't abandoned this load but I do have several other I've turned my attention to so I can get a little ammo stored back.. Only thing I'd prefer is the person is local to Navarre, ft Walton, Pensacola area.

I'd test them for you, I have a CMMG Banshee, but I'm not suppressed. I use H110 almost exclusively. What OAL are you loading to?
Are you basing seating depth by OAL or ogive?

 

[Baddog 0302]

May need to look into 180-240gr for subs. Those 135’s should make decent supers though. What problems are you having with chambering, and what size are they after pc?

To bad you don't feel the need to put an actual location in your on screen profile. There might be some casters close to you with the 200-240 gn molds

 

[Aaronhime27]

I'd test them for you, I have a CMMG Banshee, but I'm not suppressed. I use H110 almost exclusively. What OAL are you loading to?
Are you basing seating depth by OAL or ogive?

Honestly I started with the crimp groove that all thier molds have in this style. I've run atleast half a dozen different lengths. Several powers. Like you with most 300 blk supersonic I exclusively use h110. For this bullet however I did do some cfe black. But alas the issue isn't firing and cycling its chambering

 

[Jhunter]

It seems these are just to light to properly cycle subsonic. Plus powder is case sensative. But I did start working up supersonic with them. My issue is that I can't for the life of me get them to chamber correctly. If someone would want a hundred or more to try to test these I'd be willing to give them some to work up a load. If we can find a loading for them I'd offer up more in the future for the help given. I haven't abandoned this load but I do have several other I've turned my attention to so I can get a little ammo stored back.. Only thing I'd prefer is the person is local to Navarre, ft Walton, Pensacola area.

Check out Hornadys OAL length tool. You will need a modified case to measure OAL to the lands. Stay safe!

 

[Bullet Splatter]

To bad you don't feel the need to put an actual location in your on screen profile. There might be some casters close to you with the 200-240 gn molds

I don’t cast…yet.

 

[Aaronhime27]

I'd test them for you, I have a CMMG Banshee, but I'm not suppressed. I use H110 almost exclusively. What OAL are you loading to?
Are you basing seating depth by OAL or ogive?

On these it has to go by depth. I've crimped any where from 1.85 to 1.96. The round to the right shows the tip smashed from a jam but you can see OAL and crimp location. If you want to try them I'll give you some as stated above. If you can make them work ill give you a bunch more.

 

[Baddog 0302]

I don’t cast…yet.

Ok, A good source for information ,without a lot of "post whores" is the "cast Boolits" forum