H1000 & 210gr Bergers 300 WM

[Clndesl]

I just got back from the range after making some 210 bergers for my Remington 700P w/ 26" barrel. I used the data that Berger provided me and started my load at 72.5 (berger claims 2689fps) and went up in .5gr intervals to a max of 76.2gr (2836fps). So I loaded 3 rounds at each interval using new winchester brass, cci primers, H1000 and Berger 210s, coal 3.340. Through all the intervals I didnt see any signs of too much pressure. My question is the first group was the tightest (.4") but is 72.5gr and 2689 fps enough to get me out to 1000 yds. The problem is my gun did not llike the higher charges it consistantly opened up the groups to a final 3"(76.2gr). Should I try another powder or just stick with the 72.5gr of H-1000. I guess it just seems like a low charge and slow fps. Please give me some suggestions.

 

[Broz]

I have loaded for a lot of 26" 300 wins. with 210 Bergers and H-1000. Mine usually are happy about 76 or 77 gr. Did you try any dfferent seating depths? What primer are you using?

I better add I have seen some max out on pressure at 74 gr too. Depends on type of brass and rifle.

Jeff

 

[Clndesl]

The primers are CCi large magnum primers with new Winchester brass. At 75 and 76.2 gr the first 2 shots were right on top of each other then the third would be off. I did not see any signs of too much pressure no sticky bolt or flat primers at all. What would you suggest on the COAL I'm just runnin 3.340

 

[Broz]

The primers are CCi large magnum primers with new Winchester brass. At 75 and 76.2 gr the first 2 shots were right on top of each other then the third would be off. I did not see any signs of too much pressure no sticky bolt or flat primers at all. What would you suggest on the COAL I'm just runnin 3.340

I would stay with the 76 gr and move the bullet out to about .020" off the lands. I have seen them shoot pretty good from .005" in the lands to .020" off. Also if you coud get ahold of some Fed 215 GM primers or even some 210's I would try a primer change too.

Another thought is you could have some barrel pressure and was getting heat by the time you got to those loads. Maybe load some more and retest making sure the barrel is cool for the 3rd shot.

Jeff

 

[Clndesl]

I will try your suggestions and find some federal primers and I need to figure out where .02 off the lands is cause I don't have the tool yet. Thanks for your imput.

 

[Broz]

I will try your suggestions and find some federal primers and I need to figure out where .02 off the lands is cause I don't have the tool yet. Thanks for your imput.

Yeah, I would stick with it. I haven't see one yet that would not shoot there. But I do usually use Fed primers.

Your velocity looks right too for a 26" at 76 gr. I bet you will get it with some tweeking.

Jeff

 

[Johnboy]

first are you going to be hunting with this ammo or just puch holes in papper.if for hunting I would find the max length of my mag then load them to that length.if for punching holes I would find the lands of my rifel and load say .015-.020 off the lands.my reason for saying this is that you will find your accuracy node alot better with a length thats alot longer most of the time.you are reloading now so factory spec of 3.340 doesn't have to be your C.O.A.L. for the most part.

for me I have found just as the others that posted 74 and up works better for my rifel.note that I load for papper shooting and my loads are really long at 3.700 but thats what my rifel wants with my load.

I don't think your primer has much to do with your load.but some will say different.I really think you just need to find a better C.O.A.L. for your rifel.while you work up another load useing the ladder test.I have allways worked with a longer C.O.A.L. for the rifel of choice when testing.then after I have found a node or two I work on the length.but have found I really don't mess with the length after I have found the charge weight it likes.in most cases I may move up/down a few thou but not much from where I started from.

 

[ICANHITHIMMAN]

I just got back from the range after making some 210 bergers for my Remington 700P w/ 26" barrel. I used the data that Berger provided me and started my load at 72.5 (berger claims 2689fps) and went up in .5gr intervals to a max of 76.2gr (2836fps). So I loaded 3 rounds at each interval using new winchester brass, cci primers, H1000 and Berger 210s, coal 3.340. Through all the intervals I didnt see any signs of too much pressure. My question is the first group was the tightest (.4") but is 72.5gr and 2689 fps enough to get me out to 1000 yds. The problem is my gun did not llike the higher charges it consistantly opened up the groups to a final 3"(76.2gr). Should I try another powder or just stick with the 72.5gr of H-1000. I guess it just seems like a low charge and slow fps. Please give me some suggestions.

I see the issue right off the bat. You did not do the seating depth test. read the link at the bottom of my reply in the signature box.

 

[Clndesl]

Does anyone know what the max length is that will fit in my factory long action 700pss

 

[Broz]

Does anyone know what the max length is that will fit in my factory long action 700pss

I measure my seating depths from the O-give of the bullet in respect to the o-give length in the chamber. (headstamp of case to bullet O-give) I use a bullet comparator for this and recommend them. I do not have the box length of your rife. However, I have loaded for many 300 win factory senderos and was able to get to the lands with 210 bergers with out exceeding the length of factory mag boxs. If you want to get the best results I would suggest you get the tools to measure or borrow some to get your numbers specifically for your rifle.

Jeff

 

[Johnboy]

you can make a dummy round to cheack your mag length.just take a case that you will not be needing and ( neck size it if you can ) but make sure the case will chamber first with out trouble.if unable to neck size the case then just FL size it.

now just set a bullet of choice ( the berger your useing ) long first.now see if it will feed in the mag.if not set the bullet a little deeper each time you cheack to see if it will feed in the mag.( or till it goes into the mag )you can even do another one for safe measure.this will allow you to really know if the C.O.A.L. is right for your mag.being able to put two of the same in your mag will give you a good O.A.L for your mag.

question,are you useing the VLD or the BT Berger? if your useing the VLD then I can see your problem just as the other guy said it to be.your really short C.O.A.L. is allowing the loaded round to be loose in the chamber.or should I say improper headspace.( meaning the loaded round is being pushed into the chamber with the fireing pin and not being set off )so this all so means that you had a headspace issue with the new brass.but that part should be OK now that the brass has been fired for its first fireing.( fire formed )

with that all said I would still load them as long as I could.thats if you are useing the VLD instead of the BT.the VLD seems to shoot better when held out longer.or at least for me it does.