I bought a 6.5 grendel of a fella who's been reloading for it.
Looking over his reloads I see he's running 33.5g of varmint pushing a 90tnt and it appears some vmax.
I'm not a reloader so don't know much but it seems extremely hot.
Opinions?
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I bought a 6.5 grendel of a fella who's been reloading for it.
Looking over his reloads I see he's running 33.5g of varmint pushing a 90tnt and it appears some vmax.
I'm not a reloader so don't know much but it seems extremely hot.
Opinions?
0.3gn above max listed by Speer. Wouldn't say extremely hot but not a starting load even if someone else says it's OK in the rifle. Normal rule applies you shouldn't shoot other people's reloads.
https://reloadingdata.speer.com/Down...-tnt-hppdf.pdf
Thanks Makros. Doesn't seem extreme then. He reckon he worked up to that. I suppose hes doing that via the old'no pressure signs'.
Considering it had a but of recoil when I fired it compared to factory, I'll bring the load down a but when I do some.
It scoped my daughter first shot as she's too small to get behind the butt properly. Lesson learned.
Inpossible to answer without further knowledge of seating depth and case capacity.
Bullet jump (i.e. chamber geometry) also play an important role
The people that do not understand these basics should stick to factory ammo honestly.
So should you, you left out the most critcal factor . . . What is the velocity of the load. This is the most direct correlation to pressure.Quote:
Originally Posted by STC
My experience with hot (max, over max or otherwise) loads is that you will see shorter brass life (loose primer pockets, case head separation, split necks etc) sometimes case life is drastically shorter 2x fired = trash.
Is it worth it for miniscule gains especially in something like a 6.5 grendel ? Probably not.
As STC has illuded too there are many other factors to consider when deciding if a load is too hot, but what I can suggest is that all other factors unknown velocity is a very good indicator of pressure. If it's over book max in velocity for a given projectile and powder combination then it's almost certainly over pressure. As per previous comments at best you'll shorten your brass life, but depending how over pressure you may be playing with fire.
Even loads that are below book max in charge weight can be over pressure depending on othe variables such as seating depth, brass capacity, chamber length, etc so don't assume that cause it's only just over book max that it's probably safe.
Chrono it that will tell you alot, or pull the lot and do your own load development.
I know some people believe chrono are the devil but they can also tell you a lot about where your at if you use them properly and not just to chase the highest possible velocity.
its got more recoil......and has scoped daughter...drop it down to say 31-32 and be happy...if you wanted speed you wouldnt have bought a grendal ,so use it for and how you intended it to be used...a mild soft shooting accurate rifle.
Cheers. All good info. As far as I've read most of the load development is aimed at keeping it safe on the ar platform?
A few of his rounds have a weird ripple. Noy taking aim at him. He's used it shooting wobbilys down south and had great success. It's also a tack driver but as above posts. I don't need velocity like he's getting(2900). Just a gun that can punch over goats, fallow and sika.
that's moving along mine runs around 2600 2700
Fair comment.Quote:
Originally Posted by Tentman
Yeah. I've watched a fair few vids and looked at a bit of data. Seems the light bullets help alot.
Might pay to migrate the scope a bit forward if it caught her shooting on flat ground, scope contact gets a lot worse when shooting up hill in less than perfect conditions
Removing the potential should give her more confidence too I hate the idea my rifle might bite me when pulling the trigger
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interesting projectile choice,ideal for pest control but best pick your shots if want to recover meat. you COULD look at where he got to..and say to self too hot, and use just below that as absolute maximum and just pick lower load and go shoot stuff.Quote:
Originally Posted by Cowboy
Cheers. One of the legends in the forum is passing on a stock he shortened for his kid. I can shorten more if need be. It was in a bench rest and bipod. I should have been aware she didn't have her shoulder on it. Either way, she sucked it up, wiped the tears away and shot a 5shot 2moa which is pretty good for an 8yr old with too big a stock.
Velocity in and of itself isn't a sign of pressure. I have seen barrels that developed pressure signs several hundred fps below what you would consider hot load speeds, so the word there is it's but one section of the story. I would put more stock on things like case head expansion and marking and those sort of signs than directly going off velocity by itself...
I run 2 loads in my grendelQuote:
Originally Posted by Micky Duck
90gr TNT in front of 29.5gr bm2 for goats and smaller stuff. They work very well in this and I can load them cheaper than I can buy 223 round.
Then I run the 123gr eldm for deer in front of 8208. Have shot red stag at 300 with this round. Just put it in the right spot.
Im using 85 and 90gn on goats works great, cant see a problem with small deer either
If you need to load like that you bought a rifle chambered in the wrong cartridge. Simples.Quote:
Originally Posted by Micky Duck
HOW SO??? 33.5 is way to hot..so we say just above maximum...drop it down 10% would be around 30grns so a middle of road load that is safe will be in the 31-32grn weight range will it not??? grendals were made to be in a short action.... the 7.62x39mm chucks a 123grn out between 2100-2400fps this is necked down to 6.5mm and is at present chucking 90 grns at 2900fps ...thats hot...26-2700fps would still be good level of power and REASONABLY flat shooting within limitations of the small case.Quote:
Originally Posted by Oldbloke
if you wanted simple and similar power levels/preformance on game under 150yards,you buy 7.62x39mm
In my bolt action I got 3000, in the falling block 2900. 3100 with the 85 grs
I think I read somewhere that the grendel builds pressure quite fast when your getting to that point. I'm just happy with an accurate load that isn't getting into that territory..
yes but it wasnt a grendal based on x39mm case it was based on .204 ruger case...and you n I both know you were hot rodding it and suffered short brass life,and major case lengthening because of it.Quote:
Originally Posted by SmokeyJason
you couldve arguably done so much easier with less fluffing around by sticking with a .224 hole through the barrel LMFAO
you DEFINATELY could have done so MUCH easier with MUCH less fluffing around by just using a .243win
Speed freaks make me giggle ..... they load a particular cartridge to its absolute limit in pursuit of speed.
They could step up to the next cartridge case size in the same caliber and achieve the same speed with ease, but then load that case to its max in pursuit of maximum speed,
when stepping up to a magnum case in the same caliber would easily reach the same results and more.
Reminds me of the petrol heads saying, "there is no substitute for cubic capacity" :thumbsup:
Too true, I now use a 300 wsm.
If it's just a general hunting round not a long range precision round these days I pretty much just jump to 1gr under max and if it shoots just leave it at that
@ Micky Duck
Perhaps I gave the wrong impression.
We agree.
If shooters are loading to the max or more. IMO they purchased the wrong rifle.
Oh yes there is, cubic dollars ;)Quote:
Originally Posted by NIMROD