6.5 rem mag with superformance? Quick load data?

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rm_rang

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Hey guys

I am looking at trying to load some 140 grain Hornady interlock bullets in 6.5 Remington magnum for a Remington 600, meaning my max length will be 2.8 inches.

I want to try some superformance in it but there is no load data to be found

I did some comparisons between 6.5 creedmore data and the 6.5 and found a common powder, imr 4350, and did a bunch of math to find the common differences between that and superformance in the creedmore then applied that to the 6.5 rem mag data for imr 4350 to get approximate data in the rem mag for superformance

I don’t know if that’s how ballistics works so I am looking for help on where to start working up loads for the rem mag with superformance

Maybe someone out there has quick load to help me out?
 
Superformance is right next to 4831 , on the chart.


Couldn’t you use the Hornady data , using Superformance instead of 4831?

And I’m asking, not telling, as I’m curious if this is how the burn chart works?
 
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From my math that I did to get the 2900 FPS with superformance in the rem mag it came out to 52.4 grains

Maybe there is some merit to things being beside each other on the burn chart as it’s sorta close to how my calculations came out?

That said I am not a mathematician and maybe my math was faulty to begin with.
 
45C said:
Superformance is right next to 4831 , on the chart.


Couldn’t you use the Hornady data , using Superformance instead of 4831?

And I’m asking, not telling, as I’m curious if this is how the burn chart works?
Click to expand...

Be very careful about Burn Rate Charts:

1. they differ between who creates them;
2. they attempt to show "relative quickness", but not the magnitude of the difference; and
3. powder burn rate can vary quite a bit between cartridges and bullet weights.

For example, I found that in the 7X57 with 175 gr bullets, it was quite a bit faster than H4831 - https://www.canadiangunnutz.com/for...-7mm-Mauser-175gr-Loads-10-Different-Powders?

I observed the same with a heavy bullet in the 8X57 https://www.canadiangunnutz.com/forum/showthread.php/1173651-Some-8X57-Loads-with-a-218-gr-Bullet? and the opposite in the 9.3X62 with a heavy bullet https://www.canadiangunnutz.com/for...62-Loads-285-gr-PRVI-Three-Different-Powders?. Always close to H4831, but on opposite sides of it for quickness.

If you don't own a chronograph, abandon the idea.

If you do, assume that Superformance is faster than H4831 and use a published H4831 Starting Load to begin. Load up cartridges with the same load and bullet with 4831 as your "control" load to see on which side Superformance falls and to what extent.

If you go ahead, please publish the results. There are perhaps 20 people on CGN with the intellectual curiosity, the initiative, the willingness to "think outside the box" (and not live in fear), and the generosity to share - more are needed.
 
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Andy gives you good advice. I'll only add that the 6.5 Creed data should work as a starting point, as it has substantially less case capacity than the 6.5 RM. I'd look at 6.5-284 or 6.5-06 data for something closer. Proceed cautiously, but I have used these methods numerous times for oddballs I own, so it is certainly doable. - dan
 
dan belisle said:
Andy gives you good advice. I'll only add that the 6.5 Creed data should work as a starting point, as it has substantially less case capacity than the 6.5 RM. I'd look at 6.5-284 or 6.5-06 data for something closer. Proceed cautiously, but I have used these methods numerous times for oddballs I own, so it is certainly doable. - dan
Click to expand...

Yes - Hodgdon shows Superformance as slightly faster than H4831 in the 6.5 Hairbun (Creedmoor).:p

Is there a Gibbs cartridge you haven't (yet) owned? I'm in my sunset stage - maybe you are - or aren't.
 
Andy said:
Yes - Hodgdon shows Superformance as slightly faster than H4831 in the 6.5 Hairbun (Creedmoor).:p

Is there a Gibbs cartridge you haven't (yet) owned? I'm in my sunset stage - maybe you are - or aren't.
Click to expand...

Never had a 35 Gibbs, though I have used a friend's. Pretty sure I have had all the rest though. I too have reached the sunset part of life. Retired (or retarded, depends who you ask) and just plugging along. Hope you're doing well Andy. - dan
 
Actually this might be a better and safer question

Can someone run a quick load formula that can give me 3000+ FPS out of a 18.5 inch barrel with a 140gr Hornady interlock bullet with a COAL of 2.8 inches with any powder?
 
rm_rang said:
Actually this might be a better and safer question

Can someone run a quick load formula that can give me 3000+ FPS out of a 18.5 inch barrel with a 140gr Hornady interlock bullet with a COAL of 2.8 inches with any powder?
Click to expand...

In my opinion there isn't a powder that will accomplish that without exceeding 60K psi - that's ambitious even in the larger 264 Win Mag with an 18.5" barrel.

The 18.5 inch barrel alone cuts an easy 200-300 fps off of the MV you'd get with the more common 24 or 26" barrel.

Your highest MV at any given pressure will come with the load containing the most powder - slow, but not too slow....

My very much larger 6.5-300 Win Mag with a 24" barrel reaches 3300 fps, but only with a full case (84.0 grs) of US869 - you wouldn't get much more than 60.0 grs in the 6.5 Rem Mag. At 18.5" I think my 6.5-300 Win Mag would clock at about 3100 fps.

A note on Quickload - it's not based on tests using pressure testing equipment, it's software that calculates according to a model. It's useful for estimating, but it can easily be off by quite a bit (5-10%), not to mention that every gun, powder lot, etc. varies.
 
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