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Sightron Siii Eye Relief

17 Mar 2019
@ 02:12 pm (GMT)

Luke Lahdenranta

I'm wondering if anyone here who owns the Sightron Siii scopes has mounted one on a light weight magnum like a Tikka or Browning Xbolt in 300 Win Mag and if the eye relief was adequate?

The specs show 3.6-3.8 inches as the eye relief and I am wondering if that is enough. I am getting a Tikka T3x lite stainless as a gift from my dear wife for my 40th birthday. I have narrowed down the choice to getting another 30-06 or possibly stepping up to a 300 Win Mag. I have a Sightron Siii 3.5-10x44mm that will go on the rifle. I just wonder if that eye relief would be sufficient for a flyweight 300 ?

Replies

19 Mar 2019
@ 04:56 pm (GMT)

Luke Lahdenranta

Re: Sightron Siii Eye Relief
To partially answer my own question, it seems the answer is yes probably... most of the time. If the Sightron siii is a recommended scope for the 35 Whelen then some quick recoil calculations suggest that the eye relief should be fine for at least standard 300 mag factory loads. Tough awkward angle shot from prone on an elk with 200 great bullet running 2950 fps? Hmm maybe not.

Although my head tells me the Tikka is a pretty ignorant platform for playing with anything moderately to high recoiling but stainless steel left handed factory rifles are pretty tough to find around here, at least around the Tikka price point. But the world hates a coward, and it's only recoil right? so it all depends on how you look at it. After all, its not like it's a lightweight 375 RUM pushing 300 Woodleighs at 3000 fps or anything like that! :)
19 Mar 2019
@ 06:48 pm (GMT)

Chris Murphy

Re: Sightron Siii Eye Relief
Hi Luke further to your caliber choice in the Tikka the mag length is no where near adequate for the 300mag. If it is Tikka you are going for I would be going 30-0sexy. The eye relief on the s3 will be ideal
20 Mar 2019
@ 03:49 am (GMT)

Robert McLean

Re: Sightron Siii Eye Relief
I broke in a 7mm Rem Mag in a tikka T3 lite for my step son and that was about as big as I would go with that model. It kicked and jumped alot and was damn hard to keep a grip on. I finally hockey taped the stock and that helped but boy with a hot load you have to hang on or your going to take a wack in the head.

I know that the T3x has a slightly different stock but don't think it would be that different. With the 300 you would need all the eye relief you can get. IMHO the 300 in a tikka T3x is a recipe for a gun you won't enjoy shooting.

I would go with the 30-06.
20 Mar 2019
@ 04:39 am (GMT)

Robert McLean

Re: Sightron Siii Eye Relief
Maybe I was to quick to make that judgment on what you would enjoy. I don't think I would look forward to putting 20 rounds through a 300 win mag tikka t3x in a range session every week.
20 Mar 2019
@ 07:23 am (GMT)

Hamish Gibbs

Re: Sightron Siii Eye Relief
Hi luke have you considered the 300wsm in the T3x? Not to hard to modify the coal at a later date if you decide to load the heavies at optimal length. Think I remember seeing a mention of Nathans personal T3 and the mods he has done to load 208 amax/eld m at around 79mm coal in the books somewhere. Would be a handful but if you reload you could always download?
20 Mar 2019
@ 07:47 am (GMT)

Luke Lahdenranta

Re: Sightron Siii Eye Relief
I do remember Nathan mentioning that he did modify a 300 wsm to make the magazine length longer, that is something to consider. The short magazine is only a problem if loading the really long ELD bullets to longer cartridge over all lengths. I wasn't really thinking of doing that with this rifle, I was thinking as more a lightweight and potent carry rifle for hunting the tough mountainous terrain here in BC. The 30-06 would suit it just fine, I was just thinking one of the 300 mags (or maybe even the 7mm mag) would just do the exact same thing but with some additional style points, along with some extra thunder and lightning.



20 Mar 2019
@ 08:42 am (GMT)

Robert McLean

Re: Sightron Siii Eye Relief
That T3 lite 7mm rem broke in and got real close to if not MOA real easy before i gave it up. Nice easily set trigger too. I followed Nathan's Tikka break in video exactly. Some hockey tape on the fore end, a strap, and a leupold VX-2 4-12 on top and bobs your uncle.

It is a nice gun out of the box for the money.


20 Mar 2019
@ 10:25 am (GMT)

Luke Lahdenranta

Re: Sightron Siii Eye Relief
Taking a closer look at some of the COAL/mag length figures to refresh my memory the Tikka magazine runes 3.37" max and with a maximum COAL for the 300 win mag of 3.34" that leaves just a whisker for feed reliability. That is absolutely nothing for magazine length and even worse then I remembered. I knew the Tikka has a short mag but that is too short allowing for basically zero playing with seating depth for accuracy. I think I have to scratch the 300 win mag off the choice list, I just know that long term I couldn't be happy with that little magazine length.

I will have to think about the 300 WSM a bit more, that seems like it fits a little better in the Tikka if I want a little more pop than the 30-06, offering a little less recoil than the bigger 300 Win mag. I just need to stick with a stainless steel rifle this time around for an all weather/all terrain type hunting rifle.

30-06
7mm Rem Mag
300 WSM

No bad choices here.
20 Mar 2019
@ 10:28 am (GMT)

Bob Mavin

Re: Sightron Siii Eye Relief
I'm working up loads on my mates T3 Tikka lite at the moment, it's only a 308 win. 168 Z-Max and 46gns of 2208 ,,, It kicks like a mule, accurate but I hate it off the bench.
21 Mar 2019
@ 03:37 am (GMT)

Paul Leverman

Re: Sightron Siii Eye Relief
Luke- have you thought of making a custom? For whatever the price you are going to pay for a Tikka, you can set yourself up pretty darn well. A Benchmark barrel, a Boyd's stock, and a left-handed, long action Savage action (now, who in BC would have one of them he is willing to part with, and can ship through Canada Post?). Add a Rifle Basix trigger and you are good to go. Just a thought.
 

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