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.375 Raptor Recipe

GenSamHouston said:
Keep us posted on the results!!
Click to expand...
Well, here you go. Its kinda confusing and frustrating.

The filed down shellholder works. I can make brass that passes the case gauge. However, I have discovered other issues.

If I run a case through either the Lee or CH4D die with a unmodded shellholder, then the case has too much headspace. But if I run one case through both dies, then it has almost too little headspace. So I am not really sure whats going on there, yet.

Additionally, it seems that I have to size the brass closer to the minimum headspace according to the case gauge in order for it to chamber in my rifle. I headspaced my rifle using go and no-go gauges.

So I not sure what the ultimate issue is. I don't know if its just people using different tolerances, or maybe its the Starline brass I am using, or maybe I am missing something. I will keep working on it. Bottom line is that I can at least make ammo that will work for my rifle. I might try to get some commercial ammo and see how that runs in my rifle.

Why can't any of my projects be simple.😩
 
ShadowAviator said:
Well, here you go. Its kinda confusing and frustrating.

The filed down shellholder works. I can make brass that passes the case gauge. However, I have discovered other issues.

If I run a case through either the Lee or CH4D die with a unmodded shellholder, then the case has too much headspace. But if I run one case through both dies, then it has almost too little headspace. So I am not really sure whats going on there, yet.

Additionally, it seems that I have to size the brass closer to the minimum headspace according to the case gauge in order for it to chamber in my rifle. I headspaced my rifle using go and no-go gauges.

So I not sure what the ultimate issue is. I don't know if its just people using different tolerances, or maybe its the Starline brass I am using, or maybe I am missing something. I will keep working on it. Bottom line is that I can at least make ammo that will work for my rifle. I might try to get some commercial ammo and see how that runs in my rifle.

Why can't any of my projects be simple.😩
Click to expand...
Case gauges and headspace gauges are just as fallible as chambers. After all, how do you think they're made?

Use your chamber as a headspace gauge. That will be more telling as you try to match your die setting to your.... chamber.
 
Chassis came the other day. Just need to torque everything down to spec.

As pictured, just under 7lbs.
1000004131.jpg
 
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What are you using for a suppressor? Has the new .375 Magnus peeked your interest?
 
Eo12 said:
Nice build. Tikka receiver with a mostek barrel?
Click to expand...
Yep.

JR1200W3 said:
What are you using for a suppressor? Has the new .375 Magnus peeked your interest?
Click to expand...
I am using the AB Raptor 8 in .375. Haven't look at the magnus much; need to save some pennies before I get another suppressor.

Just a brief update on the weird die issues I was having:

So I made a low charge round to do a test fire, and nothing blew up, so thats good. Anyway, the fired case looked... hmm... sharper to the dimensions if that makes sense. So I ran the fired case through the CH4D die with a NORMAL shellholder, and then tried it in the case gauge and it was perfect to minimums.

So it appears to be a brass issue, I guess. I will have to try with some different brands of brass.
 
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Brief update on the die issue: No neck tension when using the CH4D die on fired brass. I believe there is an issue with the die. Lee die works okay. If anyone is using a CH4D die, I would be curious if they are having any issues.

But this thread is about load data. Well, I have a little.

Disclaimer: My reloading data is only for use by me and my rifle.

I had some time to kill, so I made some 270gr speer loads.
18" barrel. OAL 2.790 RL-10x
41.5gr- 2175
42gr- 2195
42.5gr- forgot to write down
43gr- 2238

Top brass is 41.5, bottom is 43.
The last picture is the 43gr. I can see a faint ejector mark, I think. Your thoughts? I'm new to reading pressure signs.
 

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ShadowAviator said:
Brief update on the die issue: No neck tension when using the CH4D die on fired brass. I believe there is an issue with the die. Lee die works okay. If anyone is using a CH4D die, I would be curious if they are having any issues.

But this thread is about load data. Well, I have a little.

Disclaimer: My reloading data is only for use by me and my rifle.

I had some time to kill, so I made some 270gr speer loads.
18" barrel. OAL 2.790 RL-10x
41.5gr- 2175
42gr- 2195
42.5gr- forgot to write down
43gr- 2238

Top brass is 41.5, bottom is 43.
The last picture is the 43gr. I can see a faint ejector mark, I think. Your thoughts? I'm new to reading pressure signs.
Click to expand...
That's good data. I appreciate you posting it. As far as the CH4D dies, I heard enough bad things about that kept me from ordering a die set from them. Luckily I found a set from Lee. I haven't been able to use them yet because I am still waiting on my barrel. Going on 14 months now.
 
JR1200W3 said:
That's good data. I appreciate you posting it. As far as the CH4D dies, I heard enough bad things about that kept me from ordering a die set from them. Luckily I found a set from Lee. I haven't been able to use them yet because I am still waiting on my barrel. Going on 14 months now.
Click to expand...
Who's making your barrel?
 
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I checked with Alliant today, and they said that they are still making 1200-R. I thought it had been discontinued.

Availibility is still scarce, though.
 
SAUMuvabitch said:
I have not tried 10x, because I haven’t found any. Accurate 1680 and 2200 have both been good to me. 1680 for subs and supers and 2200 for supers only.
Click to expand...
You mentioned trying 2200 with 270speers but hadn't chrono'd them.

Did you ever get the chance?

With 1680, SW blackout, and CFEBLK, I have gotten the 190gr makers to 2600+ fps. I need to do more testing to see where the pressure limits are.

However, for my 230gr VLR4, I think CFEBLK might be a bit fast. From the old website, they show 2575fps with a 235tsx using 1200-R. I'm not quite to 2500fps with CFEBLK. I can't find 1200-R, but heard Accurate 2200 was similar.
 
ShadowAviator said:
You mentioned trying 2200 with 270speers but hadn't chrono'd them.

Did you ever get the chance?

With 1680, SW blackout, and CFEBLK, I have gotten the 190gr makers to 2600+ fps. I need to do more testing to see where the pressure limits are.

However, for my 230gr VLR4, I think CFEBLK might be a bit fast. From the old website, they show 2575fps with a 235tsx using 1200-R. I'm not quite to 2500fps with CFEBLK. I can't find 1200-R, but heard Accurate 2200 was similar.
Click to expand...
I have not had the chance yet. I will try to get out ASAP.
 
Accurate 2200 might be the key to replacing 1200-R. I heard 1200-R can be really temp sensitive which isn't ideal for me.

With 10x and the 260gr accubond, it's almost like I'm running out of capacity before I hit pressure. I think 1200-R was a similar burn rate, but in a ball powder.

I just ordered a bunch of different powder to try. 2200, 2015, x-terminator, and N120.
 
I created a google sheet for users to share recipes to use as a reference.

Code: 
https://docs.google.com/spreadsheets/d/1IgkJgQpbjAg68VgrJ54Q9Kl7uYoQF-dH/edit?usp=sharing&ouid=107878224831557701342&rtpof=true&sd=true
 
Last edited:
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ShadowAviator said:
I wish I knew the pressure. The casehead looks fine. Primers are still round on edges and no cratering.

But pressure could be 65,000psi, which is over pressure, but not enough to show signs.
Click to expand...
So basically like a low range 6 Dasher load shot at a PRS match?
 
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ShadowAviator said:
I wish I knew the pressure. The casehead looks fine. Primers are still round on edges and no cratering.

But pressure could be 65,000psi, which is over pressure, but not enough to show signs.
Click to expand...
I like Starline and use in several cartridges but youl know when there’s pressure. It’s not like lapua taking 70k + and appearing fine. 65k in Starline and youl be seeing ej flow and flattened primers in most cases.
 
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