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Joined: Jan 2014
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Campfire Regular
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OP
Campfire Regular
Joined: Jan 2014
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Wondering if the throat in my Tikka is too long
The OACL listed by Nosler with the 120 ballistic tip is 2.800. However, the OACL to the lands in my Tikka is 2.918. Seems pretty long as at that length only about 2/3 of the neck has contact with the bullet and that length won't fit in my magazine. The max length that will fit in the mag is right at 2.800.
I can try a few options-
1) Load the 120s at 2.800 and see how they shoot but that's 0.118 off the lands or 2) get a longer mag and load them at 2.828 which will provide the bullet with full contact with the neck but still be 0.090 off the lands or 2) Try a different bullet
Thoughts?
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Joined: Aug 2005
Posts: 28,268 Likes: 7
Campfire Ranger
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Campfire Ranger
Joined: Aug 2005
Posts: 28,268 Likes: 7 |
I wouldn't worry about it. Seat them out to max mag box length and you'll likely shoot .75 groups or maybe better. Tikkas aren't finicky in the least. Most all of my Tikka T3 OAL's are 2.805 no matter the bullet or cartridge.
It is irrelevant what you think. What matters is the TRUTH.
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Joined: Jan 2014
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Campfire Regular
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OP
Campfire Regular
Joined: Jan 2014
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I just tried some Sierra Pro Hunter 140 Grain. OACL is 2.806. I can fit that in the mag at that length so once i take about 20 thousandths back on that it will fit perfectly. Still concerned that the throat is a bit long though.
Speer 130s won't work, similar to the 120 ballistic tips.
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Joined: Jun 2004
Posts: 44,882 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,882 Likes: 9 |
Shoot the thing and see what happens. I have a 308 that has gone 3/4 moa for a fifteen shot group jumping bullets over a tenth of an inch.
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Joined: May 2007
Posts: 3,945
Campfire Tracker
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Campfire Tracker
Joined: May 2007
Posts: 3,945 |
If this really drives you crazy,you can convert your Tikka to take the magazines designed for 30-06/270 l length cartridges. It's not hard to do and the action is long enough already. Then you can seat any 7mm bullet as long as you need.
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Joined: Jul 2013
Posts: 1,879
Campfire Regular
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Campfire Regular
Joined: Jul 2013
Posts: 1,879 |
I shoot 120 bt in my Tikka with great results, don't worry about the jump.
HMM-161, HMM-364 Semper Fi Brothers
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Joined: Jan 2010
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Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2010
Posts: 13,218 Likes: 4 |
Tikka T3 Lite Stainless and T3 Superlite:
120 NBT 51.5 grains Big Game Winchester Large Rifle Magnum primer Remington brass 2.806" OAL
3126 fps, .487" group and 3115 fps, .473" group respectively.
P
Obey lawful commands. Video interactions. Hold bad cops accountable. Problem solved.
~Molɔ̀ːn Labé Skýla~
Member #547 Join date 3/09/2001
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Joined: Jun 2006
Posts: 46,145 Likes: 7
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,145 Likes: 7 |
I have a 7-08 that shoots those bullets into tiny groups at a little over 0.010 off the lands, see how they shoot.
A wise man is frequently humbled.
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Joined: Jun 2004
Posts: 44,882 Likes: 9
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,882 Likes: 9 |
I have a 7-08 that shoots those bullets into tiny groups at a little over 0.010 off the lands, see how they shoot. Did you slip a decimal place?
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Joined: Aug 2011
Posts: 6,519
Campfire Tracker
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Campfire Tracker
Joined: Aug 2011
Posts: 6,519 |
On my T3x light Stainless my magazine measures 2.842”. Maximum cartridge length with Nosler BT’s is 2.94. I load at 2.80” and have no problem (from a bench) getting groups of half inch or slightly more. I would show pictures but since Photobucket puked, I can’t figure out how. Anyway, as many have said, let’em jump.
If we live long enough, we all have regrets. But the ones that nag at us the most are the ones in which we know we had a choice.
Doug
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Joined: Jan 2014
Posts: 1,026
Campfire Regular
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OP
Campfire Regular
Joined: Jan 2014
Posts: 1,026 |
Tikka T3 Lite Stainless and T3 Superlite:
120 NBT 51.5 grains Big Game Winchester Large Rifle Magnum primer Remington brass 2.806" OAL
3126 fps, .487" group and 3115 fps, .473" group respectively.
P Thanks all. I think I'm going to work up to this load and see how it goes.
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Joined: Jan 2010
Posts: 13,218 Likes: 4
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2010
Posts: 13,218 Likes: 4 |
Tikka T3 Lite Stainless and T3 Superlite:
120 NBT 51.5 grains Big Game Winchester Large Rifle Magnum primer Remington brass 2.806" OAL
3126 fps, .487" group and 3115 fps, .473" group respectively.
P Thanks all. I think I'm going to work up to this load and see how it goes. Nosler #7 book lists 52 as max so work up. P
Obey lawful commands. Video interactions. Hold bad cops accountable. Problem solved.
~Molɔ̀ːn Labé Skýla~
Member #547 Join date 3/09/2001
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Joined: Jun 2006
Posts: 46,145 Likes: 7
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,145 Likes: 7 |
I have a 7-08 that shoots those bullets into tiny groups at a little over 0.010 off the lands, see how they shoot. Did you slip a decimal place? Yes, and it's a good thing I showed my work! To clarify, 100 thousandths or 1/10 of an inch. I never was much of a math man.
A wise man is frequently humbled.
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Joined: May 2005
Posts: 14,104
Campfire Outfitter
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Campfire Outfitter
Joined: May 2005
Posts: 14,104 |
I load for several 7mm-08s. I try to seat them .010" off the lands, but that is not always possible. In those rifles, I have had very good results just seating them as long as they will reliably feed from a full magazine.
Ben
Some days it takes most of the day for me to do practically nothing...
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Joined: Jan 2018
Posts: 2,074
Campfire Regular
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Campfire Regular
Joined: Jan 2018
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With my Tikka 260 Rem I found by seating the bullets out to within .010 of the lands my group shrunk from right at 1" to about 3/8". I had to go to the longer mag.to accomplish this but also had to change the bolt stop. You can carefully grind the existing stop or order the longer style stop from Brownells. They are where you have to go to get them. Not cheap. In a plastic bag you get the long & the short bolt for $59 + shipping.
Last edited by Hesp; 02/24/18.
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Joined: May 2009
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Campfire Regular
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Campfire Regular
Joined: May 2009
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I lovingly have nicknamed my T3x lite 7mm-08, 'Linda Lovelace'. With those 120 nbts; it's best load to 2.806" and then psychologically convince yourself that is 'not how long it is, it's how you use it'!! This is group was caused by: 120 gr. nbts, 44.6 grs RL15, cci 200, neck sized remington brass, ~100 yds. I can live with it.
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Joined: Apr 2011
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Campfire Savant
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Campfire Savant
Joined: Apr 2011
Posts: 151,872 Likes: 22 |
Load them to factory length, see how they shoot. I always start there. If it’s an inch or less, I’m good with it. Plenty good for hunting.
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