Sub-Sonic 300 BO Mold

[Landshark9025]

Sorry to start another thread on this guys, but when I search and check mold model numbers, none are currently produced. Not just "out of stock", but not in the listings.

What I'm looking for is a decent, subsonic bullet for a 300 BO pistol (10", 1:7 twist rate, pistol length gas system). Just general plinking and giggles with a can. Hollow point is not necessary as I won't be hunting with it.

I'm considering this one from NOE
https://noebulletmolds.com/site/product-category/308-311/htc310-247-fn-bo3/

This one from Arsenal
https://arsenalmolds.com/products?product_id=190

Or one of these from Accurate
http://www.accuratemolds.com/bullet_detail.php?bullet=31-215E
(http://www.accuratemolds.com/bullet_detail.php?bullet=31-215E)
http://www.accuratemolds.com/bullet_detail.php?bullet=31-240A

Any thoughts? Also open to any suggestion of current production molds. I recognize I'll have to wait and that's fine. I'm happy to wait on "backorder", I just don't want to get my hopes up on "Discontinued".

thanks

[Tonto]

Long ago as the 300 BLK started to catch on there was a group buy on the NOE-247 grain style with the lube grooves, with or without the gas check. I waited for almost a year until it arrived and never looked back. What a great mold and bullet. Then I got an AR10 and was looking for a 200 grain bullet, the NOE-197 with the pointed tip arrived and it was a great style in the AR10 and also the BLK. With the backlog right now I suspect the wait is back but I’d say both worked great in my AR’s. I’d add that I shoot them sized and lubed conventionally and powder coated, both with and without checks. I got both molds in four cavities with two plain based and two checked cavities.

[Landshark9025]

Thanks, Tonto

The challenge is I don't know if the 247g that NOE offers now is the same profile as before. Probably close enough.

I am amazed at the fact that molds are sold out everywhere. I don't recall it being this bad back in 2014-15, but maybe I wasn't watching the casting market as close.

[Tazza]

A mad mate arranged a 300bo mould from accurate for me to use for us, it casts awesome and the testing done with it so far has been really good. I think it was 180 grain, same basic profile as the two you showed links for.

I'd like to recommend bevel base, they seem to be more forgiving with sizing, if any are over sized, it won't make a mess of the base and cause possible dags.

[Landshark9025]

A mad mate arranged a 300bo mould from accurate for me to use for us, it casts awesome and the testing done with it so far has been really good. I think it was 180 grain, same basic profile as the two you showed links for.

I'd like to recommend bevel base, they seem to be more forgiving with sizing, if any are over sized, it won't make a mess of the base and cause possible dags.

Thanks. I agree on the bevel base. Just generally makes things nicer.

Are you feeding this in ARs? (not up on Australian rules, sorry). Looking at that .2" meplat, I'm wondering how it will do on feed ramps.

[Tazza]

Sadly we have no fun semi-auto rifles for the regular shooters. They have been tested in bolt and pump action rifles so far, so i can't say how they go with an AR feed ramp. I believe one mate used a remington 7615 pump and got pretty good grouping, not as good as jacketed, but not bad for a subsonic load. The other was shot out of a 7.62 x 54 mosin nagant with a 1-10 twist at about 1,200fps.

[Landshark9025]

Well, no bevel base, but I opted for this one:
https://noebulletmolds.com/site/shop/308-311/htc310-225-rn-ce4/htc310-225-rn-ce4-5-cavity-pb/

Turns out it was designed for the 300 BO as a subsonic plinker. In fact, it is called the "300 BO Bullet Mold for Dummies" (https://www.thereloadersnetwork.com/2018/11/27/the-300blk-taco-bullet-mold-aka-300blk-bullet-mold-for-dummies-is-finished/)

I opted for the non-TL version. We'll see how it does.

[BNE]

NOE molds are great. I use a 199 grain (maybe 197?) spire point NOE Mold for my 300 BO. Great subsonic round. Highly recommend it.

[popper]

I use a RD style 170 PB in my pistol, ~850 fps. Could pump it up to 1100 or so. Also run it 1400 for sd and hogs. 2400 powder.

[GregLaROCHE]

Have you considered Lee’s 230 grain mould? A lot less expensive, if you can find one today.

[BJK]

Greg, I have NOT seen the LEE mold you mention, but having gotten my first NOE mold today the LEE molds I do have are crude in comparison. But as you stated they don't cost as much.

[Iron369]

Well, no bevel base, but I opted for this one:
https://noebulletmolds.com/site/shop/308-311/htc310-225-rn-ce4/htc310-225-rn-ce4-5-cavity-pb/

Turns out it was designed for the 300 BO as a subsonic plinker. In fact, it is called the "300 BO Bullet Mold for Dummies" (https://www.thereloadersnetwork.com/2018/11/27/the-300blk-taco-bullet-mold-aka-300blk-bullet-mold-for-dummies-is-finished/)

I opted for the non-TL version. We'll see how it does.

That’s the one I have. https://uploads.tapatalk-cdn.com/20210218/b7d43f617301895b0f3af2e06fdc3013.jpg
https://uploads.tapatalk-cdn.com/20210218/a21763d1dcbae00f3b463642b0c052b2.jpg


Sent from my iPhone using Tapatalk

[44Blam]

Well, no bevel base, but I opted for this one:
https://noebulletmolds.com/site/shop/308-311/htc310-225-rn-ce4/htc310-225-rn-ce4-5-cavity-pb/

Turns out it was designed for the 300 BO as a subsonic plinker. In fact, it is called the "300 BO Bullet Mold for Dummies" (https://www.thereloadersnetwork.com/2018/11/27/the-300blk-taco-bullet-mold-aka-300blk-bullet-mold-for-dummies-is-finished/)

I opted for the non-TL version. We'll see how it does.

Darn it, Landshark... Now I have ANOTHER 30 caliber mold. I do get a new 300 BO upper in a few days... I got the 5 cavity one.
I've got the 165 Fn mold that I plan on pushing in the 1600-1800 fps range. This one looks like it'll be in the 1000-1200 fps range.

[Landshark9025]

Have you considered Lee’s 230 grain mould? A lot less expensive, if you can find one today.

Hey Greg,

I had considered this and I was going to get it, but heard too many poor reviews of casting well undersized even with powder coat. Keyhole targets, etc. Combined with it being OOS, I figured to pass.

This will be my first NOE mold. I do have a few MP and one Arsenal.

[Landshark9025]

That’s the one I have. https://uploads.tapatalk-cdn.com/20210218/b7d43f617301895b0f3af2e06fdc3013.jpg
https://uploads.tapatalk-cdn.com/20210218/a21763d1dcbae00f3b463642b0c052b2.jpg


Sent from my iPhone using Tapatalk

Any insight to performance? I'll be shooting this out of a 1:7 barrel. Probably start around 10g of CFE BLK.

I see you went grooveless as well.

[Landshark9025]

Darn it, Landshark... Now I have ANOTHER 30 caliber mold. I do get a new 300 BO upper in a few days... I got the 5 cavity one.
I've got the 165 Fn mold that I plan on pushing in the 1600-1800 fps range. This one looks like it'll be in the 1000-1200 fps range.

What is your upper? And yeah.....I'm a bad influence.

[44Blam]

What is your upper? And yeah.....I'm a bad influence.

It is a Moriarti upper with a 16" barrel.

[Landshark9025]

It is a Moriarti upper with a 16" barrel.

OK. Looks like they are all 1:7 or 1:8. Mine is a 1:7. I'll be using an approx 93/5/2 alloy that will be water dropped after coating. (Shake-Bake-Dump method). First loads will be with CFE BLK. Based on how low pressure it is compared to Lil Gun for the same velocity, I'm hoping it will be very quiet with the can.

[44Blam]

OK. Looks like they are all 1:7 or 1:8. Mine is a 1:7. I'll be using an approx 93/5/2 alloy that will be water dropped after coating. (Shake-Bake-Dump method). First loads will be with CFE BLK. Based on how low pressure it is compared to Lil Gun for the same velocity, I'm hoping it will be very quiet with the can.

I did looked at that in Quick Loads and it looks like it is going to be in the 20k psi range at around 1000fps... With a low burn rate. Seems like it'll be dirty. Looks like a pretty full case of CFE gives good velocity and clean burn.

What DOES look good for subsonic is HERCO or UNIQUE... 100% burn rate and about 40k psi for 1000 fps.

[Landshark9025]

Interesting. CFE BLK seems to be next to AA 1680 in terms of burn rate and just a touch slower than Lil Gun and H110.

If you have Quick Loads, can you run Lil gun on a 10" 1:7 BBL just for curiosity?

[popper]

Try 2400 - works well.

[Landshark9025]

Try 2400 - works well.

Thanks. I'll add that to my list for next powder order. Right now I'm pretty stocked up on powder so it might be a while. There are no local retailers here. Closest is a Bass Pro an hour away. They won't have any for a long time.

[44Blam]

Interesting. CFE BLK seems to be next to AA 1680 in terms of burn rate and just a touch slower than Lil Gun and H110.

If you have Quick Loads, can you run Lil gun on a 10" 1:7 BBL just for curiosity?

It looks like it's gonna be dirty in subsonic and might do well a bit faster. But I've read things about Lil gun over the years that scared me off of trying it out... Maybe search the archives or ask around about it.

[44Blam]

Try 2400 - works well.

I'm thinking 2400 is gonna be good for super sonics... Probably also for subs. Will find out soon. :cbpour:

[Landshark9025]

It looks like it's gonna be dirty in subsonic and might do well a bit faster. But I've read things about Lil gun over the years that scared me off of trying it out... Maybe search the archives or ask around about it.

Wasn't able to find anything negative on Lil Gun. I do know one of the mods over on A15.com had issues with H-110 with 150g(I think) bullets were .2g caused a pressure spike. He swears by H110 for 125g and less and Lil Gun for anything over 125g.

I've shot several hundred of the Lee 312-155 2R over 14.8g of Lil Gun without seeing any signs. My load workups went to 15.8 and didn't see anything out of the ordinary- other than groups opening up. Seemed to really like the lower charge weight.
278136

That's actually a five shot group at 100 yards.

If you'd heard anything negative, I'd be interested to know.

[44Blam]

Wasn't able to find anything negative on Lil Gun. I do know one of the mods over on A15.com had issues with H-110 with 150g(I think) bullets were .2g caused a pressure spike. He swears by H110 for 125g and less and Lil Gun for anything over 125g.

I've shot several hundred of the Lee 312-155 2R over 14.8g of Lil Gun without seeing any signs. My load workups went to 15.8 and didn't see anything out of the ordinary- other than groups opening up. Seemed to really like the lower charge weight.
278136

That's actually a five shot group at 100 yards.

If you'd heard anything negative, I'd be interested to know.

You getting 1500-1600 fps?

[44Blam]

Darn it, Landshark... Now I have ANOTHER 30 caliber mold. I do get a new 300 BO upper in a few days... I got the 5 cavity one.
I've got the 165 Fn mold that I plan on pushing in the 1600-1800 fps range. This one looks like it'll be in the 1000-1200 fps range.

Got the mold today -- 5 day from order to my door. That's some great service.

[Landshark9025]

You getting 1500-1600 fps?

A little more than that. Average was 1822.

And good on ya for getting your mold. Maybe mine will come soon as well. I haven't gotten the ship notice, but did get the charge. Five day turnaround is great "in these trying times......".