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> 270win reloading help
270win reloading help
@ 01:06 am (GMT) |
Ed StewartHi everyone, I know Nathan is a busy man but I figure there will be someone on here to help point me in the right direction. I have just started reloading, I am using the 130g SST's, AR2209 powder, Winchester large rifle primers and Remington brass. I have a COAL of 83.5mm for optimum concentricity. I have found that that 54.0g works well in my Weatherby Vanguard and Dads Tikka T3 shooting 3 shots sub MOA after one fouling shot at around 50fps slower then factory loaded hornady 130g SST. When I tried the same load in my mates Sako A7 it shot around 5.5inches. We then tried 54.3g which is ADI's listed max load it shot 4.3" at 2965fps (25fps slower then factory loads). I know the rifle shoots well with factory loads so I am not sure what I need to do to to get the same performance. Do i need to set the COAL to the same as the factory or slowly work up a higher powder charge or change projectiles to something easier to get a good load for. Let me know if there is any more information I need to provide. It is going to be a couple of weeks before I will get a chance to test some more loads.Thanks, Ed. |
Replies
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@ 08:11 pm (GMT) |
Nathan FosterRe: 270win reloading helpTough call Ed. I have seen the A7 fall into three categories:1. Won't shoot anything inside 6" with groups up to 12". 2. Will shoot one brand of ammo or load inside 1 MOA but very oddly, may shoot another brand of ammo up to 12 MOA (I have never ever seen this level of discrepancy with another brand of rifle before). Your friends A7 falls into this category. 3. Will generally shoot accurately with various ammo and loads. The A7 is a part of a radical cost cutting exercise. I have gone into details of the design (photos and changes from past models) in my book. I cannot even begin to guess what load will work in the rifle in question. You may have to radically alter velocities or seating depths. For my money, if the owner has found an accurate load, leave it as is. |
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@ 12:55 am (GMT) |
Ed StewartRe: 270win reloading helpThanks for the reply Nathan. I look foward to reading all about it when I order your book later in the week. I may try different seating depths and velocities just to see what happens and to use up the rest of the 130g projectiles. I am going to switch to the 150g SST and have a go at annealing them after reading the knowledge base. We need something that is capable of taking down pigs, reds and fallow from 50 to 300m.Thanks for all your help and information. |
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@ 01:35 am (GMT) |
Trevor WilkesRe: 270win reloading helpHi EdI have a sako A7 in 22-250 had simular problem but not that bad but I ended up fine tuning the action screws so try loosening them off then tighten them up a little after each string and see if it makes any change it did for me. Dont go over the top with the tourqe. I have been through this a couple of times now but I am going to replace the stock to a laminated stock its a shame as the rifle feels good in the hands. I also have 270 in tikka t3 laminated stock I run my 130sst at 55.2gr and also playing with the 150sst around 52.5gr of 2209 these loads are with rem brass and fed 210 primers loaded to fit in the mag. Hope my suggestion helps in someway or another. Cheers Trev. |
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@ 05:21 am (GMT) |
Ed StewartRe: 270win reloading helpHi TrevorThanks for that, I will look into the action screws and see how I go. I will get some 150g SSTs to try next time too and keep those loads in mind as something to work towards. Thanks, Ed. |
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@ 02:50 pm (GMT) |
Nathan FosterRe: 270win reloading helpTorque settings and stock splaying are problematic in both the T3 and A7 as outlined in the book. Correct torque settings are 35lb (quite light). Good point Trev. |
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@ 03:38 pm (GMT) |
Trevor WilkesRe: 270win reloading helpNathan,I assume thats 35 inch lbs Im sure thats what I have done mine at. Just a quick question Nathan was curious wether the action screws would have to be at the same torque as I have heard other guys with less torque on the front action srew. Cheers Trev. |
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@ 09:48 pm (GMT) |
Nathan FosterRe: 270win reloading helpPeople used to say, heavy on the front. light on the tang- which was right because it was often easy to split the tang of a rifle. Accuracy seems unaffected. But where the stock is strong enough to handle it or using modern materials, pliiars, chassis, synthetics- even torque settings are recomended and work fine.The most pronounced changes occur with three screw actions if the middle screw is over torqued. Think I will leave it there, I have written a book about this. |
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@ 01:52 am (GMT) |
Ed StewartRe: 270win reloading helpHi Trev,Do you know what velocities you are getting with the 150g SST and 52.5g of AR2209 out of you T3? Just got some 150's and tried them out today, was getting 2700fps with 49g but in the knowledge base it says I need to be getting around 2900 for them to work best. Nathan, is 2600fps fast enough out of a 7mm08 with 162g Amax for bush shooting? about 200m max range. Have finished reading your book, was very well written and I learned heaps. Have also just ordered some bedding compound and stock stabiliser for the Weatherby. Cheers, Ed. |
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@ 07:02 pm (GMT) |
Nathan FosterRe: 270win reloading helpHi Ed, you'll get 40fps per grain of powder (generally speaking).49- 2700 49.5- 2720 50- 2740 50.5- 2760 51- 2780 51.5- 2800 52- 2820 52.5- 2840 53- 2860 53.5- 2880 54- 2900 54.5- 2920 55- 2940-2960 From what you have described, your rifle is pretty normal and is what I would expect when working on a .270. 2600fps is a good MV for the 7mm08 and A-Max if bush hunting. |
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@ 08:19 pm (GMT) |
Trevor WilkesRe: 270win reloading helpQuote: Hi Trev,
Do you know what velocities you are getting with the 150g SST and 52.5g of AR2209 out of you T3? Just got some 150's and tried them out today, was getting 2700fps with 49g but in the knowledge base it says I need to be getting around 2900 for them to work best. Nathan, is 2600fps fast enough out of a 7mm08 with 162g Amax for bush shooting? about 200m max range. Have finished reading your book, was very well written and I learned heaps. Have also just ordered some bedding compound and stock stabiliser for the Weatherby. Cheers, Ed. Sorry Ed no I havnt just dont seem to get the time lately I have just been working up in grain amounts finding all the sweet spots will crony them sooner or later. Im sure those velocities Nathan has listed will be near the mark guess ii depends on barrel length. I do know this once I get up in powder charge my accuracey goes west and Im sure its me not the rifle something I have to address in my shooting old habits die hard. Cheers Trev. |
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