Powder usage "test spreadsheet"

[hemiford]

I had a thought on illustrating a trend for powder usage ( burn rate ).
This is only an attempt to show a general trend.
I welcome your opinions on how to set up a test such as this.

Here goes: What powders would you use to load the following two cartridges, three different bullet weights in each ?

1. 7-08 Rem
A.) 120-gr
B.) 160-gr
C.) 195-gr

2. 7-RUM
A.) 120-gr
B.) 160-gr
C.) 195-gr

I hope it's kind of clear what I'm hoping to illustrate here, how would you change this "test" ?
Details like barrel length, distance to lands, etc, I was hoping to eliminate as comparison variables by just stating
it would be the same for each of the 6 powder recommendations.

 

[bmnkbrandon]

7 rum
120gr- no idea that's a lot of case and a little bullet
160 gr- I'd guess and say n160 or 4831. Would think n165 be a bit slow for that light of a bullet
195gr- slow powders that might give you a chance at a decent barrel life. N165, h1000, Staball hd, ramshot grand, rl33. Personally I'd go with rl33 since that's what I like in rum cases with heavy weight bullets. But I'm really starting to get intrigued by ramshot grand and n165 is proving to be a solid replacement for rl33 and I'm hoping will replace it since I can actually find it. Rl33 is the preferred by far for accuracy (in my experience) but I only have 2 pounds left and can't locate more

 

[bmnkbrandon]

7mm-08
I'll start by saying I don't have one but have experimented with very similar 7mm cartridges.

Pretty much same thing, just be leaning on the fast side for each bullet class.
120gr- again not sure, never used that class of bullet
160gr- Staball 6.5, n160 (if you have the barrel to burn it), n550 if chasing speed. Rl17 would be choice though
195 gr- lot of bullet for small case. I would attempt it with n550. Probably be the best shot at getting a decent velocity.

Don't take my advice too strongly. There's a lot more wisdom on this forum than what I could ever hope to provide

 

[ARlife4me]

not sure about a spreadsheet, but having 2 that doesn't have anything in common other than bullets and barrels lengths if trying to find any correlations? with a new gun or barrel i start by finding max coal. if max gets a bullet where i want it for seating, then i don't throat it. or i just use a lighter bullet/design to meet that criteria. to find powder possibilities i use 2 things, data from mfgr and ql. with a seating depth where i want it, i then select 4 powders if possible) and make 5-10 per various powder charges and note data. i haven't tried any computerized spreadsheets, only use a spiral. what 1 could do is having (say 4 powders w/ variable charges) having a target of their own to note vertical shots, cut the into strips after, laid next to each other, tape onto whatever size backing needed and compare. that would be as close to a spreadsheet as i would do?

 

[Mikecr]

It won't work.
The best trending I've seen can be pulled from info posted here:

The Rifle Section @ www.reloadersnest.com

Reloaders's Nest is a resource for all handloaders seeking the ultimate load. Browse trough thousands of loads, even in the oddest and rarest caliber. Now you will also find a lot of reloading hardware and reviews of all the equipment you use during reloading.

web.archive.org

 

[hemiford]

It won't work.
The best trending I've seen can be pulled from info posted here:

The Rifle Section @ www.reloadersnest.com

Reloaders's Nest is a resource for all handloaders seeking the ultimate load. Browse trough thousands of loads, even in the oddest and rarest caliber. Now you will also find a lot of reloading hardware and reviews of all the equipment you use during reloading.

web.archive.org

That site looks interesting. Not all loads appear to be accessible.

 

[ADR..]

It won't work.
The best trending I've seen can be pulled from info posted here:

The Rifle Section @ www.reloadersnest.com

Reloaders's Nest is a resource for all handloaders seeking the ultimate load. Browse trough thousands of loads, even in the oddest and rarest caliber. Now you will also find a lot of reloading hardware and reviews of all the equipment you use during reloading.

web.archive.org

Wonderful resource. Thank you for posting this link.

 

[Mikecr]

The original site died for a while and was later resurrected, I think in archive form.
I run what-if loads in QuickLoad, and then confidence check them at reloaders nest, before any real testing.

 

[std7mag]

I have a 7mm-08AI instead of the standard 7mm-08.

For 100-140gr bullets, I've used H414 (W760), IMR 4350, Alliant PP2000MR & RL17.

150,160gr, IMR4381 & RL19.

Even at that the 160gr bullets encroached a fair bit into the case.

My rifle was nowhere near throated enough to shoot a 195gr bullet.

Never owned or shot a RUM.