Running RL-33 in my 264 mag and getting very little temp effect, .4/degree in my rifle. At least until it hits 100+. Haven't tried it above about 90 though.

Anyone think that barrel twist rate could be the root cause of a rifles inability to "Like" one bullet and not another?

I have been told by two knowledgeable shooters that the 5.6 rounds used by the US military have RL-15 in them. If true must be rather temp stable.

Highly doubt that. Most commercially loaded ammo is based off powder not available to the public.

Say what ?

Period on the wrong side. 4 fps/degree

I have been told by two knowledgeable shooters that the 5.6 rounds used by the US military have RL-15 in them. If true must be rather temp stable.

The powder you can buy is not what commercial high volume loaders use. They can be similar but not always the same.

Yes and no. A lot of the same powders are used all the time. Many of the commercial powders have a different part number but are the same powder. WC844 is used all the time, which is the same as H335. There are some powders not available retail, but are a near duplicate of the retail one.

Ok, so you are a little correct, and 100% wrong at the same time. I have heard this MANY times from shooters. Yes, you are correct because the crappy factory ammo you are currently shooting, your rifle does not shoot it well with this particular bullet. Now, it does NOT mean that your rifle dislikes this bullet!!!! What it does not like is the load used with that bullet. Meaning the powder and powder charge (often very large powder variation inside) loaded with that bullet.

Now, I can take the same exact bullet and load it in the sweet spot with a match grade powder and that same bullet will shoot very good. I have done this MANY times. Recently I had a customer who tried several different factory ammo options in his 300 Win Mag with a 180 grain Accubond. He really wanted to shoot the 180 AB. He brought the rifle to me and said don't shoot this bullet, my rifle doesn't like this bullet. I repeated what I just wrote. I explained to him if that is the bullet you want to shoot, then let me load this bullet for you. When I was done with the load work up, the rifle shot freakin' great with the 180 Accubond.

So again today, a guy wants some match grade 270 Win ammo for an upcoming elk hunt. I recommend the 140 Accubond (AB) (among other bullets), but he tells me his gun doesn't like the AB. No. Not correct!

So please, for the love of things Holy.... Just because your rifle doesn't shoot well with one bullet, does not mean that your rifle does not like that bullet. Now, I feel better!

Now, I can take the same exact bullet and load it in the sweet spot with a match grade powder and that same bullet will shoot very good.

Thanks ChadTRG42,

What do you mean by "I can take the same exact bullet and load it in the sweet spot with a match grade powder"

Thanks

What in the world does this statement mean "rifle does not like that ammo"? If I am paying $XXXX in cost to go hunt an animal my rifle better like every bullet within manufacturer specification I shoot in the barrel. And the rifle better shoot accuracy every time I squeeze the trigger unless I, the shooter, am not a good shooter.

Shooters often buy a variety of different factory ammo with the same bullet. But the ammo they try doesn't shoot that well, so they assume their rifle doesn't like that bullet. My point is, that is not 100% correct. I can take that same bullet and load it with a match grade powder in the sweet spot of the accuracy node to have the best chance to shoot well. Match grade powder, meaning a powder that is temp stable and is in the correct burn rate to maximize velocity. For example, take the Federal Premium line of 308 ammo. Their 175 grain ammo is "listed" at 2600 fps. Often times the velocity is much less than that. I load my 175 and 180 grain ammo at 2700 fps with a match grade, temp stable powder. The federal ammo will most likely be a ball powder that is temp sensitive, so in my opinion, is not a true match grade ammo. Plus factory ammo often has a high extreme spread of at least 50-60 fps on the minimum side, and often in the 80-150+ fps extreme spread. So, my true "match grade" ammo will run much faster that factory ammo, have a much lower extreme spread on the velocity variation, and use a match grade powder that is loaded to .02 grains consistency on the powder charge. And all for about the same price as factory ammo. All these differences make a very good and consistent match grade ammo. I'm the guy people call when they want to shoot tiny groups a long ways off! I laugh when someone tells me they can shoot Rem Core-Loks for $1.20 a round and it works just fine. I say go ahead, and try to quickly hang up the phone. Guys that buy a box or 2 of ammo a year of the cheapest ammo they can find, generally, won't know the difference between my ammo and the cheap stuff. Shooters that are serious or want to step up their shooting to the next level call me. Those are the shooters I cater to.

[quote=Goodo Texas Boy] But feed it some match ammo that is loaded with the right powder and in the accuracy node, and it shoot tiny bughole groups.