200 accubond .300 wby recipe

[lamiglas]

A couple questions:

1) I have a .300 wby, model 700 sendero and want to work up a good load. any information on a good starting point would be appreciated
2) from what I read, I cannot start at the rifleing and back off due to the design of the weatherby chamber. so for this round, any recomendation on a .col ?
3) should I crimp?

Any help would be appreciated.

 

[kraky2]

I have a really fussy 300 wby mag ultralight that loved 86 grains of retumbo under the 200 ab. This gun was a real pain in the *** and I was about to rebarrel it when this load showed great promise. REMEMBER this wby has freebore....does your Remington?? You may have to start quite a bit lower and work up. I would recomend that you start by loading at "clip length" and work back if accuracy not what you want....maybe .025" at a time.

 

[MagnumManiac]

I have a really fussy 300 wby mag ultralight that loved 86 grains of retumbo under the 200 ab. This gun was a real pain in the *** and I was about to rebarrel it when this load showed great promise. REMEMBER this wby has freebore....does your Remington?? You may have to start quite a bit lower and work up. I would recomend that you start by loading at "clip length" and work back if accuracy not what you want....maybe .025" at a time.

Kraky1,
I agree with your question about whether Remingtons have the freebore or not!
I don't think they do,mine didn't anyway! I added it myself,just on 1/2" was what a factory barrel was that I measured,so that's what I did to mine.The only way to know if you have freebore is to load a dummy round with the bullet out extra long,chamber it and see if the bullet is pushed back into the case.
I couldn't even use factory rounds,they blew primers;It also might have been caused by very hot weather over here,I'm really not sure!I only fired 1! The bolt locked up,and I couldn't open it in the field! I had to put it in a vice to get enough torque on it to open it.I sold it not long after I lengthened the throat.I did play with a few loads,using RE22,H1000 and H4831sc.
Before I increased the throat,I couldn't get anywhere near max loads out of any of my manuals,it ran up to 5grs less with pressure signs.
My rifle now is a Winchester Mod 70 switch barrel,it has freebore,so I won't post any loads until Lamiglas has his chamber and throat measured.
MagnumManiac
gun)

 

[lamiglas]

I plan on doing just that in the near future and wont do any loading before I do. until then, I had a conversation with a gentleman at nosler this afternoon and he said he was positive that the Rem had a free bore and he recommended loading at the max col, (3.560). after I do a dummy load test, I will repost with what I find. thanks for the info so far.

 

[Flybuster]

Lamiglas, welcome to the forum. I like your choice in fishing rods! (lamiglas) been using them all my life.

 

[kraky2]

If the new 180 e-tip winds up being a good shooter I think it's gonna be an awsome bullet. I am a big believer in the solid copper bullets as far as terminal performance. The new tipped bullets should take away any chance for a "non-expansion" situation. The new e-tip is so long it's a virtual ballistic twin to the 200AB.
I did happen to load the 200 ab for a friends 300 wby and he shot a 6x6 elk behind the shoulders. The bullet didn't exit but the elk died so I guess we can't argue bullet performance. I like exit wounds if I can get them. I'm not sure I'm sold on accubond durability from all the reports on the web. I wish my friend had taken a bit more time to find the bullet or analyze the wound channel but he didn't.

 

[lamiglas]

I loaded a 200 gr accubond loosley in the case at 3.890. this was plenty to long for the magazine but I wanted to check on the freebore issue. I painted the bullet with a black sharpie and chambered the round. it didnt touch the lands and it didnt seat the bullet any further. can i assume then that it has freebore? In the past I have used the speer manual and only loaded to their "col tested at". In the speer manual it has a different max for each bullet type/weight and for the 200 grain bullet it lists 3.560. nosler information I read only gives one col not specific for bullet type/weght, and the hodgon website shows a col for the 200 gr accubond at 3.590. in addition to this info, kraky1 mentioned starting at max magazine length and going from there. kraky1, does this mean up to the point of the 3.590, or do you not worry about listed max col's? can going outside of listed col's cause pressure danger? so far the load I am working on is a 200 gr accubond, retumbo powder in 1/2 grain increments starting at 79 grains. the only left to determine is a col? any additional info on safety, accuracy etc, as it pertains to col in a freebore chamber is greatly appreciated.

Thanks again.

 

[MagnumManiac]

I loaded a 200 gr accubond loosley in the case at 3.890. this was plenty to long for the magazine but I wanted to check on the freebore issue. I painted the bullet with a black sharpie and chambered the round. it didnt touch the lands and it didnt seat the bullet any further. can i assume then that it has freebore? In the past I have used the speer manual and only loaded to their "col tested at". In the speer manual it has a different max for each bullet type/weight and for the 200 grain bullet it lists 3.560. nosler information I read only gives one col not specific for bullet type/weght, and the hodgon website shows a col for the 200 gr accubond at 3.590. in addition to this info, kraky1 mentioned starting at max magazine length and going from there. kraky1, does this mean up to the point of the 3.590, or do you not worry about listed max col's? can going outside of listed col's cause pressure danger? so far the load I am working on is a 200 gr accubond, retumbo powder in 1/2 grain increments starting at 79 grains. the only left to determine is a col? any additional info on safety, accuracy etc, as it pertains to col in a freebore chamber is greatly appreciated.

Thanks again.

Don't bother with what the manuals recommend on COL,except when a particular bullet is SHORT in length,then you will need to seat it at least ONE CALIBRE into the neck;.308".
Otherwise,just seat your bullets just shy of the end of your magazine,and you should be good to go.
Of course others will say to juggle seating depths to tune for accuracy,and rightly so,but with the 300 Weatherby,I have never found it to make much difference,it's pretty accurate as long as you 'tune' your loads for it.
You will be quite safe as long as you adhere to the loads in most MODERN manuals,freebore actually LESSENS pressure,so you can use larger 'doses' of powder,within limits of course,this is why Roy Weatherby used 'freebore',to get the highest possible velocity from his cartridges.
MagnumManiac
gun)

 

[lamiglas]

Thank you, your responses have helped me to better understand this issue. I have always tried to stay within referenced guidelines, so seating beyond the max col listed concerned me, but after researching and reading your responses I am no longer concerned about it. because I have freebore, I cant use the lands as a reference so I will do as suggested and start just shy of magazine length and go from there.
thanks again guys, this site is invaluable!

 

[lamiglas]

Thank you, your responses have helped me to better understand this issue. I have always tried to stay within referenced guidelines, so seating beyond the max col listed concerned me, but after researching and reading your responses I am no longer concerned about it. because I have freebore, I cant use the lands as a reference so I will do as suggested and start just shy of magazine length and go from there.
thanks again guys, this site is invaluable!

 

[lamiglas]

Sorry about the double post. I loaded up several rounds starting at 80 grains, in 1/2 grain increments on up to 84 grains. The bullet is seated to 3.595 and when I seated the 84 grain version I could hear powder compress. is this okay? sorry for all of the newbie type questions!

Bill
Rathdrum Idaho

 

[kraky2]

You should be good to go....

Do you have a chrono to watch the velocity as you go up in powder?

AND..out of curiosity what brand of brass are you loaded with??

I think you'll want to stop somewhere in the 3000-3050 area. In my gun thats where I was at with 86.0 of retumbo-----but all guns are different. Funny thing about retumbo...it seems to kind of squeak as it gets compressed instead of crunching....at least mine did. I once pulled some bullets that had highly compressed retumbo and found that I had a heck of a time shaking the powder out....it had kind of packed into a wad.

 

[RemmyTim]

Retumbo and RL-22 are going to be the best powders to use with bullets heavier then 165 grains (atleast they are with mine). Mine likes the 86gr of Retumbo and the 200gr Accubond as well.

I will be concentrating solely on the Barnes TSX from now on after getting the performance I did this fall.I will post results after I finally tune in the load.

As far as finding COAL, just seat to the length of your magazine and call it good. You can adjust the powder amount to fine tune it.

Tim