Sierra #2155 & #2156 155 grain MK

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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should treated as suspect and not used.

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Forum rules
All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.

Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
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ColinR

Sierra #2155 & #2156 155 grain MK

#1 Post by ColinR »

I usually use #2155 Sierra MK 155gr but thought I'd try the #2156 Palma version. However I cannot find any load data for this bullet using N140. It is a longer bullet so will not corellate with the #2155 version. VV don't list it and it's not in my Sierra reloading guide which I think is the latest. Any help please.
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20series
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Re: Sierra #2155 & #2156 155 grain MK

#2 Post by 20series »

You'll find that the oal will be different because of the slimmer profile of 2156 youll be able to load them longer

as for powder weights i found them to be pretty much identical to 2155

Hth
Alan
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ColinR

Re: Sierra #2155 & #2156 155 grain MK

#3 Post by ColinR »

I am wondering if they will fit my AI mags in that case.
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20series
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Re: Sierra #2155 & #2156 155 grain MK

#4 Post by 20series »

ColinR wrote:I am wondering if they will fit my AI mags in that case.
Shouldnt be a problem, its more the shape than length..If i remember correctly it was about 50thou longer into the lands
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools!!
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TJC

Re: Sierra #2155 & #2156 155 grain MK

#5 Post by TJC »

ColinR wrote:I am wondering if they will fit my AI mags in that case.
Yes no problem. AI is usually 2.85 min.
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ColinR

Re: Sierra #2155 & #2156 155 grain MK

#6 Post by ColinR »

Thanks all for info. #2155 shoot superbly in my AI so I wonder why I'm bothering with trying #2156, but nothing ventured nothing gained. I usually use 44.2 of N140 so will start a little lower with the #2156's.
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GazMorris

Re: Sierra #2155 & #2156 155 grain MK

#7 Post by GazMorris »

20series wrote:as for powder weights i found them to be pretty much identical to 2155
x2

When I was using Vit N140 I used to use 46.0grn for both (albeit with different bullet seating lengths) with no problems. The usual disclaimers about starting lower and working up apply.

Cheers,

Gaz
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