6.5 grendel and 748

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6.5 grendel and 748

Post by northdude » 29 Aug 2021, 11:22 am

Any of you guys tried win748 and a 85gr sierra in your grendel?
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Re: 6.5 grendel and 748

Post by Bill » 29 Aug 2021, 11:55 am

No, only ever used 8208 in my Grendel for the last 6 years, recently started using Leverevolution behind 90gr for even better results, have since rebarrelled to 6mm ARC
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Re: 6.5 grendel and 748

Post by northdude » 29 Aug 2021, 6:54 pm

it was giving good accuracy haunt chronoed it tho
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Re: 6.5 grendel and 748

Post by SCJ429 » 29 Aug 2021, 7:58 pm

Unless you already have a heap of 748 or are getting it for free, I would not bother with it.
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Re: 6.5 grendel and 748

Post by northdude » 29 Aug 2021, 8:59 pm

how come? we have a powder shortage over here so need to make do with what you have
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Re: 6.5 grendel and 748

Post by Bill » 29 Aug 2021, 9:21 pm

northdude it should be fine to use, obviously dont go crazy with your start load.

Lots of chatter that 748 is very similar to H335, which is similar to 8208 but slightly faster. Start somewhere around 28gr and work your way up :thumbsup:
When a guy is digging his own grave, you don’t fight him for the shovel.

Success leaves clues, Fools follow failure !

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Re: 6.5 grendel and 748

Post by No1_49er » 29 Aug 2021, 9:32 pm

QuickLOAD figures for 748 show 28gn to be rather tired - 78% case capacity and (calculated) 1800bar pressure. SAAMI spec max pressure is 3585bar. You'd be getting close to that with 35gn / 3460bar / 98% case capacity.
But, as with all reloading, work up to your max with care.

Edit - QuickLOAD MV for 28gn = 2600, 35gn = 3250. A "modest" increase :)
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Re: 6.5 grendel and 748

Post by northdude » 30 Aug 2021, 7:16 am

thanks. I tried cfe223 in it but that was slow as.
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Re: 6.5 grendel and 748

Post by MtnMan » 30 Aug 2021, 7:53 am

No longer imported in to Australia. I used it in .222rem but had to change.
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Re: 6.5 grendel and 748

Post by No1_49er » 30 Aug 2021, 8:41 am

What charge weight of cfe223 did you use?
Using QuickLOAD, 37.0gn of 223 reports as 100% case capacity, 3250fps, 3490bar (SAAMI max 3585bar), so not "out of the park".
Maybe you could continue developing a cfe load?
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Re: 6.5 grendel and 748

Post by No1_49er » 30 Aug 2021, 8:46 am

MtnMan wrote:No longer imported in to Australia. I used it in .222rem but had to change.

It may well be that it is no longer imported into Australia, but, maybe the OP has a significant quantity of cfe223 that he wishes to use?
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Re: 6.5 grendel and 748

Post by SCJ429 » 30 Aug 2021, 8:48 am

northdude wrote:how come? we have a powder shortage over here so need to make do with what you have

You end up using a lot of components to develop a load and end up switching powder to something better. If it is what you have or you get the powder for free, then why not.
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Re: 6.5 grendel and 748

Post by Bill » 30 Aug 2021, 10:59 am

No1_49er wrote:QuickLOAD figures for 748 show 28gn to be rather tired - 78% case capacity and (calculated) 1800bar pressure. SAAMI spec max pressure is 3585bar. You'd be getting close to that with 35gn / 3460bar / 98% case capacity.
But, as with all reloading, work up to your max with care.

Edit - QuickLOAD MV for 28gn = 2600, 35gn = 3250. A "modest" increase :)


Id not be recommending 35gr of anything in a 6.5 Grendel just say. DO you shoot a Grendel ?

Obviously too many variable but 28gr-29gr would be a very safe starting point and work your way up. 33gr seems to be a suggested max load for 90gr so 85gr wont be far off.

CFE223 work extremely well with 90-105gr in my ARC never tried it in the Grendel. Paid only $31lb recently :drinks:
When a guy is digging his own grave, you don’t fight him for the shovel.

Success leaves clues, Fools follow failure !

20 Hornet, 218 Bee, 222 Rem, 256 WM, 6mm ARC, 6.5 Grendel, 6.5x55 Scan, 270 Win, 357 Mag, 358 Win, 9.3x62, 500 A Square
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Re: 6.5 grendel and 748

Post by northdude » 30 Aug 2021, 11:55 am

MtnMan wrote:No longer imported in to Australia. I used it in .222rem but had to change.

im in nz
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Re: 6.5 grendel and 748

Post by northdude » 30 Aug 2021, 12:29 pm

i was using 32gr cfe with a 90gr speer tnt 2584fps.Also used 2219 30.2 gr gave me 2965fps with a 85gr sierra
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Re: 6.5 grendel and 748

Post by No1_49er » 30 Aug 2021, 12:48 pm

Bill wrote:
No1_49er wrote:QuickLOAD figures for 748 show 28gn to be rather tired - 78% case capacity and (calculated) 1800bar pressure. SAAMI spec max pressure is 3585bar. You'd be getting close to that with 35gn / 3460bar / 98% case capacity.
But, as with all reloading, work up to your max with care.

Edit - QuickLOAD MV for 28gn = 2600, 35gn = 3250. A "modest" increase :)


Id not be recommending 35gr of anything in a 6.5 Grendel just say. DO you shoot a Grendel ?

Obviously too many variable but 28gr-29gr would be a very safe starting point and work your way up. 33gr seems to be a suggested max load for 90gr so 85gr wont be far off.

CFE223 work extremely well with 90-105gr in my ARC never tried it in the Grendel. Paid only $31lb recently :drinks:


I don't recall anything in my previous post that suggested a load of 35gn cfe223 should be used.
I did say that, as with any load development, you work up to max' with care.
And, as you state, 33gn seems to be a suggested max load for 90gn, so 85gn wont be far off. Seems to be a suggested max load? Suggested by whom? And if 33gn is OK for a 90gn projectile, would it be unreasonable to suggest that a slightly larger powder charge might be appropriate for a lighter projectile?
On what basis do you declare that "I'd not be recommending 35gr of anything in a 6.5 Grendel"? You have some public data that can be referred to?
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Re: 6.5 grendel and 748

Post by Bill » 30 Aug 2021, 7:04 pm

Mate the first part of the conversation is regarding W748 where you suggested SAAMI spec max pressure is achievable with 35gn ( 98% case capacity)

Quickload is a good reference most of the time but checking established reloading data like ADI and other online resources will give you a better idea of a max load .

CFE223 is another conversation :thumbsup:
When a guy is digging his own grave, you don’t fight him for the shovel.

Success leaves clues, Fools follow failure !

20 Hornet, 218 Bee, 222 Rem, 256 WM, 6mm ARC, 6.5 Grendel, 6.5x55 Scan, 270 Win, 357 Mag, 358 Win, 9.3x62, 500 A Square
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Re: 6.5 grendel and 748

Post by northdude » 30 Aug 2021, 7:19 pm

its a neat little round. Haven't been playing with it long I've got a howa mini suppressed and some kind of bottom metal that replaces the plastic cant remember what it is maybe jefferson outdoors or something. Seems to shoot well for the price of it.
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Re: 6.5 grendel and 748

Post by Bill » 30 Aug 2021, 7:26 pm

totally agree northdude and Ive had 2 of the Grendels. Just fun little package the Howa mini :drinks:
When a guy is digging his own grave, you don’t fight him for the shovel.

Success leaves clues, Fools follow failure !

20 Hornet, 218 Bee, 222 Rem, 256 WM, 6mm ARC, 6.5 Grendel, 6.5x55 Scan, 270 Win, 357 Mag, 358 Win, 9.3x62, 500 A Square
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Re: 6.5 grendel and 748

Post by No1_49er » 30 Aug 2021, 11:17 pm

Bill, it is not my intention to pick a fight over what each of us is saying.

The original question was about using WW748, for which QuickLOAD reports a tired load if using 28gn.
I then went on to say that QL reports WW748 at 35gn, 98% capacity, 3460bar as being close to (theoretical) max.

CFE223 is not another conversation.
It was brought into the discussion by the OP who stated that he had tried it and found it to be "slow as". My response was to volunteer info' from QL that might have improved the outcome with 223. Same conversation. His trial of 32gn is at significant variance to QL which advances to 37gn. "as with any load development, you work up to max' with care".

Checking established load data from the likes of ADI is all well and good, but it does not show data for WW748 or CFE223, for which OP was querying.
A trawl of 6.5Grendell forums would suggest that CFE223 is a bit too slow for the light projectile - more suited to 100gn plus. So, a 100% capacity load might not be out of the question.
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Re: 6.5 grendel and 748

Post by northdude » 31 Aug 2021, 8:45 am

the other thing to be aware of is what the book says and what actually happens in real life can be 2 very different things...
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Re: 6.5 grendel and 748

Post by Bill » 31 Aug 2021, 9:13 am

All good No1 49er, Quickload is a great tool but It should be only used in combination with est data. Burn rates charts gives a good indicator of where W748 sits compared to other more commonly used powders. Ive played with an awful lot of diff pills and powder combo's and W748 sits pretty close to CFE223 and Leverevolution. 2 Powders I have been using exclusively for the last 12 months in both my Grendel and 6 mm Arc. Like you mentioned fantastic powders with 90gr plus weight. :drinks:
When a guy is digging his own grave, you don’t fight him for the shovel.

Success leaves clues, Fools follow failure !

20 Hornet, 218 Bee, 222 Rem, 256 WM, 6mm ARC, 6.5 Grendel, 6.5x55 Scan, 270 Win, 357 Mag, 358 Win, 9.3x62, 500 A Square
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Re: 6.5 grendel and 748

Post by northdude » 14 Jan 2022, 6:11 pm

Do any of you grendel guys get split necks after about 3 reloads?
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Re: 6.5 grendel and 748

Post by No1_49er » 14 Jan 2022, 7:03 pm

How often do you anneal the cases?
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Re: 6.5 grendel and 748

Post by Bill » 14 Jan 2022, 7:29 pm

northdude wrote:Do any of you grendel guys get split necks after about 3 reloads?


i have 1 spilt neck in maybe 1500 rounds, I anneal every 2nd firing these days. Easy to do.

Primer pockets tell me these days Ive pushed things too far LOL
When a guy is digging his own grave, you don’t fight him for the shovel.

Success leaves clues, Fools follow failure !

20 Hornet, 218 Bee, 222 Rem, 256 WM, 6mm ARC, 6.5 Grendel, 6.5x55 Scan, 270 Win, 357 Mag, 358 Win, 9.3x62, 500 A Square
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Re: 6.5 grendel and 748

Post by northdude » 15 Jan 2022, 3:24 am

I don't anneal but will be soon as I've ordered an annealer. Its the only round I reload for that I get them
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